Package - bip39

Bitcoin

Discussion about Bitcoin. BitcoinSV restores the original Bitcoin protocol, will keep it stable, and allow it to massively scale on-chain. BSV will maintain the vision laid out by Satoshi Nakamoto in the 2008 white paper - Bitcoin: A Peer-to-Peer Electronic Cash System.
[link]

Here's my suggested new Trezor setup checklist.

  1. Read the manual: https://wiki.trezor.io/
  2. Upgrade FW to the latest release
  3. Initialize it and write down your seed
  4. Create a 5 or 6 word passphrase using BIP39, or diceware
  5. Ensure your passphrase is less than 50 characters
  6. Enable PIN and passphrase on your device and write it down as well.
  7. (Optional) Create a guessable pin and enable it as your wipe PIN
  8. Enable Account Labeling as a safeguard to mistyped passphrases.
  9. Create a guessable second passphrase (with labeling) as your decoy wallet)
  10. Print your xpub) and keep it with your seed / pin / passphrase
  11. Do a dry-run recovery to ensure your wrote the seed down correctly.
  12. Perform a wipe-device to ensure that recovery brings the proper labeling / xpubs back.
  13. Set up Trezor Password Manager to hold your passwords.
  14. Add Trezor as your U2F device (security key) for your exchanges
  15. Create some SSH keys with your Trezor
  16. (Linux only) Create a GPG key with your Trezor
  17. Move 10% of your coins off of the exchange to your Trezor decoy wallet.
  18. Move the other 90% of your coins to the real (non-decoy) wallet
  19. If thieves ask for your pin and passphrase, give the wipe-pin or decoy-passphrase.
submitted by brianddk to TREZOR [link] [comments]

Best wallet apps?

I currently own a Coinbase wallet and only log on through my laptop and browser for my iPad. I’ve checked the App Store and noticed negative reviews for the Coinbase app. Is there any real draw backs to the app or are these reviews jus full of it? I’m obviously not going to have my laptop with me all the time so if I can buy sell or trade on the app while I’m on the go then that be great but don’t want to bother fiddling with app if it’s not worth it. Thank you all for your continued support
submitted by dmota0890 to BitcoinBeginners [link] [comments]

Bitcoin / Cryptocurrency Security Is It Possible to Add a Second Layer?

I am kind of new to crypto, less than 1 year. Recently I am playing with Ledger Nano S. I understand that we can openly share the public key, like the bitcoin address. Because there is no way to extract private key from public key.
I understand that I have the back up for my private keys. But still don't feel very safe.
I mean, let's say, by any chance, someone stole my back up phrase, then they can easily steal my crypto and I don't even know it until I check my balance. I know I have to keep my back up phrase safe and private, but there is a chance right?
Other than that, what if, by such a small probability that someone draw 24 random words from BIP39 word list, and it happens to be the same with my back up phrase? I know the probability is very very very low, but still, not 0, right?
I am thinking that, is it possible, in future, crypto like bitcoin, incorporate another layer of security besides private key witness, for example, when anybody move my bitcoin with my private key (I mean the move on blockchain, not within exchange), I will receive an email notification immediately, which has an approval link. Without clicking the approval link, my crypto still can not be spent although it was signed by private key. Just like withdraw from binance or coinbase. Google authenticator is the first layer, the link in email is the second layer. Is it possible in the near future? Or any crypto work like this way please?
submitted by chilianlin87 to Bitcoin [link] [comments]

Best exchange for tiny amounts of fork coins? (BCH, BSV, etc)

A buddy of mine had a pre-SegWit BIP39 seed from a couple years back. I helped him figure it out and sweep his coins to a new bech32 address. For my trouble, he told me I could keep the keys and use them to claim the various Bitcoin forks that have popped up since he bought those coins.
It's not a lot of money by a long shot. My guess is that BCH BSV and BTG combined will net me maybe 20 bucks. But I'm stuck inside on account of this coronavirus thing so I figure I may as well tinker around with blockchains and get myself a 12 pack outta all this. As a boredom buster if nothing else
The problem is the amounts are really small, too small to meet the minimum threshold at Changelly. Also, I know there are a lot of Bitcoin forks but I can't find an exchange that supports half of them. Is there a good exchange for this sort of thing? Preferably without KYC so I don't have to wait for all that to go through? I was hoping to swap them out for BTC or LTC
submitted by spirtdica to CryptoCurrency [link] [comments]

Ferrum Network Community Update — December 8, 2019

Dear Community,
What an exciting and jammed pack few weeks it has been — with the launch of staking, the 2Key Network partnership, and a major Kudi update — to name a few!
But as the profile of Ferrum continues to grow, it is essential we never stray from the fundamentals that got us this far: hard work, transparency, and a commitment to community.
In this community update, we provide a recap of the last few weeks, and look ahead to a few initiatives we are planning.
Business Update
With the release of the FRM Flexible Staking platform, we took that opportunity to kick the marketing into high gear. These marketing efforts paid off, and we were fortunate to be picked up by top influencers like Teh Moonwalker, Oddgems, and Micro Cap Gems. Here’s what happened the past few weeks.
Tech Update
For those who missed the Tech Update from our CEO Naiem Yeganeh, PhD, here are some highlights:
First Kudi Update
The First Kudi team on the ground in Nigeria continues to make significant progress.
What’s Next
It is critical we capitalize on the attention we have garnered from the team and community efforts, and to start 2020 with a bang. Here are some of the upcoming initiatives we are working on.
Flexible ERC-20 Staking v0.2
We are strongly considering launching another round of staking. We are taking the lessons learned from the first round and improving the experience. Community feedback will be key to make version two even better, so expect to see a series of polls in the coming days.
A Trading Community
A strong group of FRM traders who post technical analysis on social media is great for exposure and great for liquidity. We are currently laying the groundwork to build a trading community to come up with initiatives like trading competitions and special trading rewards. Anyone interested in joining such a community should PM Ian on Telegram.
FRM on Kudi
We have been working hard to add FRM and ETH to the Kudi app so our users can buy it directly with Naira. This will also open up additional utilities for the FRM token, including a premium membership program that will reward users for holding the token and using the app. More details to follow.
Expansion into other Markets
As you may know, one part of our business model is to partner with top notch teams in emerging markets where our fiat gateway + payments app technology can be successful.
We are happy to report that we have started to work with such a team in Brazil and they are in the early stages of launching their own product powered by Ferrum Network. More news to follow.
Conclusion
Thank you all for your continued support of Ferrum Network. 2019 was a really special year that we will never forget. But together we can make 2020 even better!
Very truly yours,
The Ferrum Network Team
Ferrum Network Links:
Website: https://ferrum.network/
Telegram: http://telegram.ferrum.network
Twitter: http://twitter.ferrum.network
LinkedIn: http://linkedin.ferrum.network
YouTube: http://youtube.ferrum.network
Reddit: http://reddit.ferrum.network
Bitcoin Talk: http://bitcointalk.ferrum.network
Facebook: http://facebook.ferrum.network
Github: https://github.com/ferrumnet/
Instagram: http://instagram.ferrum.network
submitted by tentbobert to FerrumNetwork [link] [comments]

Groestlcoin 6th Anniversary Release

Introduction

Dear Groestlers, it goes without saying that 2020 has been a difficult time for millions of people worldwide. The groestlcoin team would like to take this opportunity to wish everyone our best to everyone coping with the direct and indirect effects of COVID-19. Let it bring out the best in us all and show that collectively, we can conquer anything.
The centralised banks and our national governments are facing unprecedented times with interest rates worldwide dropping to record lows in places. Rest assured that this can only strengthen the fundamentals of all decentralised cryptocurrencies and the vision that was seeded with Satoshi's Bitcoin whitepaper over 10 years ago. Despite everything that has been thrown at us this year, the show must go on and the team will still progress and advance to continue the momentum that we have developed over the past 6 years.
In addition to this, we'd like to remind you all that this is Groestlcoin's 6th Birthday release! In terms of price there have been some crazy highs and lows over the years (with highs of around $2.60 and lows of $0.000077!), but in terms of value– Groestlcoin just keeps getting more valuable! In these uncertain times, one thing remains clear – Groestlcoin will keep going and keep innovating regardless. On with what has been worked on and completed over the past few months.

UPDATED - Groestlcoin Core 2.18.2

This is a major release of Groestlcoin Core with many protocol level improvements and code optimizations, featuring the technical equivalent of Bitcoin v0.18.2 but with Groestlcoin-specific patches. On a general level, most of what is new is a new 'Groestlcoin-wallet' tool which is now distributed alongside Groestlcoin Core's other executables.
NOTE: The 'Account' API has been removed from this version which was typically used in some tip bots. Please ensure you check the release notes from 2.17.2 for details on replacing this functionality.

How to Upgrade?

Windows
If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), then run the installer.
OSX
If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), run the dmg and drag Groestlcoin Core to Applications.
Ubuntu
http://groestlcoin.org/forum/index.php?topic=441.0

Other Linux

http://groestlcoin.org/forum/index.php?topic=97.0

Download

Download the Windows Installer (64 bit) here
Download the Windows Installer (32 bit) here
Download the Windows binaries (64 bit) here
Download the Windows binaries (32 bit) here
Download the OSX Installer here
Download the OSX binaries here
Download the Linux binaries (64 bit) here
Download the Linux binaries (32 bit) here
Download the ARM Linux binaries (64 bit) here
Download the ARM Linux binaries (32 bit) here

Source

ALL NEW - Groestlcoin Moonshine iOS/Android Wallet

Built with React Native, Moonshine utilizes Electrum-GRS's JSON-RPC methods to interact with the Groestlcoin network.
GRS Moonshine's intended use is as a hot wallet. Meaning, your keys are only as safe as the device you install this wallet on. As with any hot wallet, please ensure that you keep only a small, responsible amount of Groestlcoin on it at any given time.

Features

Download

iOS
Android

Source

ALL NEW! – HODL GRS Android Wallet

HODL GRS connects directly to the Groestlcoin network using SPV mode and doesn't rely on servers that can be hacked or disabled.
HODL GRS utilizes AES hardware encryption, app sandboxing, and the latest security features to protect users from malware, browser security holes, and even physical theft. Private keys are stored only in the secure enclave of the user's phone, inaccessible to anyone other than the user.
Simplicity and ease-of-use is the core design principle of HODL GRS. A simple recovery phrase (which we call a Backup Recovery Key) is all that is needed to restore the user's wallet if they ever lose or replace their device. HODL GRS is deterministic, which means the user's balance and transaction history can be recovered just from the backup recovery key.

Features

Download

Main Release (Main Net)
Testnet Release

Source

ALL NEW! – GroestlcoinSeed Savior

Groestlcoin Seed Savior is a tool for recovering BIP39 seed phrases.
This tool is meant to help users with recovering a slightly incorrect Groestlcoin mnemonic phrase (AKA backup or seed). You can enter an existing BIP39 mnemonic and get derived addresses in various formats.
To find out if one of the suggested addresses is the right one, you can click on the suggested address to check the address' transaction history on a block explorer.

Features

Live Version (Not Recommended)

https://www.groestlcoin.org/recovery/

Download

https://github.com/Groestlcoin/mnemonic-recovery/archive/master.zip

Source

ALL NEW! – Vanity Search Vanity Address Generator

NOTE: NVidia GPU or any CPU only. AMD graphics cards will not work with this address generator.
VanitySearch is a command-line Segwit-capable vanity Groestlcoin address generator. Add unique flair when you tell people to send Groestlcoin. Alternatively, VanitySearch can be used to generate random addresses offline.
If you're tired of the random, cryptic addresses generated by regular groestlcoin clients, then VanitySearch is the right choice for you to create a more personalized address.
VanitySearch is a groestlcoin address prefix finder. If you want to generate safe private keys, use the -s option to enter your passphrase which will be used for generating a base key as for BIP38 standard (VanitySearch.exe -s "My PassPhrase" FXPref). You can also use VanitySearch.exe -ps "My PassPhrase" which will add a crypto secure seed to your passphrase.
VanitySearch may not compute a good grid size for your GPU, so try different values using -g option in order to get the best performances. If you want to use GPUs and CPUs together, you may have best performances by keeping one CPU core for handling GPU(s)/CPU exchanges (use -t option to set the number of CPU threads).

Features

Usage

https://github.com/Groestlcoin/VanitySearch#usage

Download

Source

ALL NEW! – Groestlcoin EasyVanity 2020

Groestlcoin EasyVanity 2020 is a windows app built from the ground-up and makes it easier than ever before to create your very own bespoke bech32 address(es) when whilst not connected to the internet.
If you're tired of the random, cryptic bech32 addresses generated by regular Groestlcoin clients, then Groestlcoin EasyVanity2020 is the right choice for you to create a more personalised bech32 address. This 2020 version uses the new VanitySearch to generate not only legacy addresses (F prefix) but also Bech32 addresses (grs1 prefix).

Features

Download

Source

Remastered! – Groestlcoin WPF Desktop Wallet (v2.19.0.18)

Groestlcoin WPF is an alternative full node client with optional lightweight 'thin-client' mode based on WPF. Windows Presentation Foundation (WPF) is one of Microsoft's latest approaches to a GUI framework, used with the .NET framework. Its main advantages over the original Groestlcoin client include support for exporting blockchain.dat and including a lite wallet mode.
This wallet was previously deprecated but has been brought back to life with modern standards.

Features

Remastered Improvements

Download

Source

ALL NEW! – BIP39 Key Tool

Groestlcoin BIP39 Key Tool is a GUI interface for generating Groestlcoin public and private keys. It is a standalone tool which can be used offline.

Features

Download

Windows
Linux :
 pip3 install -r requirements.txt python3 bip39\_gui.py 

Source

ALL NEW! – Electrum Personal Server

Groestlcoin Electrum Personal Server aims to make using Electrum Groestlcoin wallet more secure and more private. It makes it easy to connect your Electrum-GRS wallet to your own full node.
It is an implementation of the Electrum-grs server protocol which fulfils the specific need of using the Electrum-grs wallet backed by a full node, but without the heavyweight server backend, for a single user. It allows the user to benefit from all Groestlcoin Core's resource-saving features like pruning, blocks only and disabled txindex. All Electrum-GRS's feature-richness like hardware wallet integration, multi-signature wallets, offline signing, seed recovery phrases, coin control and so on can still be used, but connected only to the user's own full node.
Full node wallets are important in Groestlcoin because they are a big part of what makes the system be trust-less. No longer do people have to trust a financial institution like a bank or PayPal, they can run software on their own computers. If Groestlcoin is digital gold, then a full node wallet is your own personal goldsmith who checks for you that received payments are genuine.
Full node wallets are also important for privacy. Using Electrum-GRS under default configuration requires it to send (hashes of) all your Groestlcoin addresses to some server. That server can then easily spy on your transactions. Full node wallets like Groestlcoin Electrum Personal Server would download the entire blockchain and scan it for the user's own addresses, and therefore don't reveal to anyone else which Groestlcoin addresses they are interested in.
Groestlcoin Electrum Personal Server can also broadcast transactions through Tor which improves privacy by resisting traffic analysis for broadcasted transactions which can link the IP address of the user to the transaction. If enabled this would happen transparently whenever the user simply clicks "Send" on a transaction in Electrum-grs wallet.
Note: Currently Groestlcoin Electrum Personal Server can only accept one connection at a time.

Features

Download

Windows
Linux / OSX (Instructions)

Source

UPDATED – Android Wallet 7.38.1 - Main Net + Test Net

The app allows you to send and receive Groestlcoin on your device using QR codes and URI links.
When using this app, please back up your wallet and email them to yourself! This will save your wallet in a password protected file. Then your coins can be retrieved even if you lose your phone.

Changes

Download

Main Net
Main Net (FDroid)
Test Net

Source

UPDATED – Groestlcoin Sentinel 3.5.06 (Android)

Groestlcoin Sentinel is a great solution for anyone who wants the convenience and utility of a hot wallet for receiving payments directly into their cold storage (or hardware wallets).
Sentinel accepts XPUB's, YPUB'S, ZPUB's and individual Groestlcoin address. Once added you will be able to view balances, view transactions, and (in the case of XPUB's, YPUB's and ZPUB's) deterministically generate addresses for that wallet.
Groestlcoin Sentinel is a fork of Groestlcoin Samourai Wallet with all spending and transaction building code removed.

Changes

Download

Source

UPDATED – P2Pool Test Net

Changes

Download

Pre-Hosted Testnet P2Pool is available via http://testp2pool.groestlcoin.org:21330/static/

Source

submitted by Yokomoko_Saleen to groestlcoin [link] [comments]

If you want to dump BSV... some tips on splitting safely. Don't lose your BCH!

Many people are interested right now in gathering up their BSV coins and dumping them on exchanges. Bittrex has just opened deposits however there is a big caveat:
If you attempt to dump your BSV coins onto an exchange like Bittrex, and you have not properly split the coins, a replay attack could result in permanent loss of your (much more valuable) BCH!!!
For this reason it is essential that you split your coins and verify that the coins are split.

Step 1 : get your coins into Electron Cash

Electron Cash ( https://electroncash.org/ ) is the de-facto wallet for coin splitting since it allows you to connect to both BCH and BSV chains, simply by selecting a different server in the Network dialog.
Important: do not make a separate wallet in Electron Cash and send your coins from another wallet. This transaction might fail to replay, though this failure to replay could be temporary and leave your coins in a dangerous state where replays could happen at any time. Instead, you need to load another copy of your wallet in Electron Cash.

Mobile wallet / other software wallet

We will start by importing your wallet seed into Electron Cash.
Create new wallet with type "Standard wallet". "I already have a seed". For BIP39 seeds (see below) click Options button to enable BIP39 seed, and then enter the path on the subsequent page.

Wallet.dat / other non-deterministic wallets

Some wallets don't use seeds and just generate random addresses. You'll need to export your private keys in WIF format, then create a new Electron Cash wallet using "Import Bitcoin Cash addresses or private keys".
If you are using my coin splitter tool, there is a bug with imported-address wallets that prevents using the splitter from Tools menu. So, right click on the address to do splitting that way.

Hardware wallet

Try to set up your hardware wallet in Electron Cash. This lets you transact on both BCH and BSV chains even if the official software for your hardware wallet (such as Trezor's) does not support this.

Step 2 : split your coins

Although there are tools (like my special variant release of Electron Cash) for making split guaranteed split coins from scratch, there are easier ways. In particular if you can get a small 'dust' split coin from someone else, then you can leverage this to rapidly split your whole wallet. I recommend following Calin's guide here.
BCH split dust sources:
Calin's guide also has instructions on how to select BCH and BSV servers, so it's a good read regardless.
There are some cases where a BCH transaction fails to replay initially but then later gets replayed. This could mean that your initial 'dust' initially looks like a split coins but is not, and the replay protection is faulty. For this reason, you should also make a conflicting transaction on the BSV chain, by spending at least one of the same transaction inputs back to yourself.

Step 3 : wait a bit, just to be safe.

With threats of block re-organization attacks floating around, you should wait several confirmations to make sure the splitting 'sticks' and is effectively irreversible.

Step 4 : verify the split

Visit these two block explorer sites and enter the transaction IDs of both your BCH splitting transaction, and your BSV conflicting transaction:
BCH explorer: https://blockdozer.com/
BSV explorer: https://bchsvexplorer.com/
On each site enter both transaction ID's. You want to ensure here that transaction A is only on BCH chain, and transaction B is only on BSV chain.
If you have failed to split, then one txid will be on both chains. If this happens, don't worry! You can just go back to step 2 and try again.

Step 5 : send BSV

Now that your BSV is split from BCH, you can send it whereever you want without fear if having your BCH accidentally dragged along with it.
I cannot provide any advice on what you should do, financially, with your BSV coins. Good luck, and stay smart!
submitted by markblundeberg to btc [link] [comments]

Question about some old seeds I found - I need your expert opinions!

I found some old seeds.
1) I found two seeds that are each 12 words. I opened up electrum and I clicked that I already have a seed. I entered in my seed words. I had to change it to be BIP39 address in order for electrum to allow me to click next. But when I logged in nothing really happened. No transactions. No coins. Did I do this right? Neither of those seeds show anything received or sent which doesn't seem correct. I think one of these was to a jax wallet and the other may have been to a "blockchain" account.

2)I also found a log in/password for CRYPTSY but I assume that they already stole all my stuff. I've known about that for a while. Any news on this? Pretty sure I'd be retired because I was holding a ton of DARKCOIN which became DASH but whatever.

3) I also found a log in for what I wrote as "blockchain wallet". But when I go to blockchain.net or blockchain.com it asks me for both a "wallet ID" which I don't have. I just have a password. https://login.blockchain.com/#/login
When I tried to use the "lost email" link and I punched in my emails it doesn't seem like I received anything to my known emails. Any thoughts?

4) I also have a seed that doesn't make any sense. It has 17 words. One of the words is written poorly by me as "donner". Another one of the words is written as "hogans". Wtf? What could this seed have gone to?

5) I have a written down log in/ password for a website called "CRYPTOLIFE.NET". I don't remember using that site at all and if you asked me today I would say that I had never heard of it. But here it is in my writing - a log in - next to the word "cryptolife.net". I went to their website and I couldn't figure out how to log in.

My impression is that there may be nothing here. If my memory serves me I had taken all the bitcoin out of these wallets/exchanges and put everything on cryptsy. However, there could be some dust or maybe like .05 bitcoin or something and I'd love to retrieve it. Any ideas?

Thanks for the help team!
submitted by Benjamincito to BitcoinBeginners [link] [comments]

Let's go over good vs. bad hardware wallet design.

EDIT I want to be clear you cannot screen cap the trezor pin.
This is an example of an awful hardware wallet design. To understand why let's refer to the OG the Trezor.
  1. Reliability. The Trezor doesn't have a battery. That means when it's in your pocket there is no chance of someone coming by and wirelessly stealing your private keys. I expect my hardware wallet to be stolen/lost. That being said I do expect that my device be able to work as long as I take care of it. Having a battery kind of limits the shelf life to 5 years or so.
  2. Keep it simple stupid. The Trezor only has a USB connection. That's okay. I'd rather see a camera personally. My understanding is the chip with the private keys is not connected to the USB output so that's good.
  3. I still have limited trust in hardware wallets. AFAIK the Trezor doesn't have an exploit that allows the private keys to leave the device without modifying the hardware. This is an acceptable limitation.
  4. The Trezor is open source.
  5. The Trezor has a screen. This is absolutely vital to prevent man in the middle attacks. It's moronic to have a hardware wallet without a screen.
  6. When you access your Trezor it presents you with a randomly ordered keypad you enter your pin through your computer with a mouse. This way there is no way to keylog or screen cap your pin.
So lets talk about the hoofoo.
  1. It doesn't have a screen. This is an immediate disqualification. There is a very real possibility that the address would be swapped in memory and you wouldn't know.
  2. It has wireless communication over bluetooth. Bluetooth is not a good standard for hardware wallets to use. For one you're broadcasting the encrypted data wirelessly. Not all encryption is created equal. AFAIK all the wifi standards are crackable with sufficient data collection in less than a month. look up blueborne
  3. As a general rule I'll never buy a product that claims to be "hacker proof" unless it's got a REALLY good design. This isn't it.
  4. 2FA? On a local device that makes no sense. Maybe they are talking about a 2FA through the blockchain with multisig but that costs money. Is he really saying 2FA is your fingerprint/facial recognition (both trivially compromised (seriously just use a picture of the owner) and spoofing a bluetooth device. This sounds so simple and easy I halfway want to buy one just to crack it the first day. This doesn't even qualify as 2FA in my opinion because both of the factors are controlled by a single device. The entire point of 2FA in my opinon is to have a completely separate device be responsible for authorizing you. Otherwise there is no point the device is a single point of failure.
  5. OMFG It allows you to access signing your private keys with finger print and face recognition... thats MORONIC!! Fingerprint scanners are in no way secure and face recognition ... did you see the apple keynote or youtube? This is probably the worst hardware wallet ever created.
  6. These idiots actually believe that you can't fake a bluetooth mac address? (again this guy is blatantly lying when he says that hardware wallets like the trezor have been hacked w/o a hardware modification)
  7. What the fuck is a motherbox? Having 2 devices that can recover your private key ... Does he mean seed? Does he not know the difference between a seed and a private key? Nothing in the video indicates he's using the BIP39 standard. What happens when your house burns down and you lose both your hardware wallet and the motherbox? What are the design specifications on this motherbox? Sorry but if it's capable of recovering private keys and seeds then the security details surrounding it need to be gone over.
Hoofoo is a scam. The claims made are provably false. Do not support this company.
Security features I'd like to see in a future version of a hardware wallet are as follows.
I really like the features of the trezor, they got a lot of things right as I mentioned above. Limited communication access on old wired technology. A screen. The way you input the pin so it cannot be screen recorded or keylogged (they should disable keyboard input on internet connected devices but that comes down to user error I guess)
  1. I'd prefer the USB to be charge only without communication. Instead I'd rather use QR codes to exchange the unsigned and signed transactions back and forth. I could see the device allowing you to scan a QR code, and you verifying it looks good. Then putting in your pin to sign.
  2. I'd like the option to hold a small battery powered qi charger to the back of the device to provide it power.
  3. I'd like the device to ship with the components visible in a clear plastic coating. I would like to be the one who encloses the device and that case once put on cannot be removed without destroying the hardware wallet.
submitted by lizard450 to Bitcoin [link] [comments]

Groestlcoin September 2019 Development Release/Update!

For a more interactive view of changes, click here
In our current world; bordering on financial chaos, with tariff wars, Brexit and hyperinflation rife, you can count on Groestlcoin to consistently produce innovation that strikes to take the power away from the few and into the many, even after a full five and a half years of solid development.
Here is what the team has already announced in the last 3 months since the last development update:

What's Being Released Today?

Groestl Nodes

What am I?

Groestl Nodes aims to map out and compare the status of the Groestlcoin mainnet and testnet networks. Even though these networks share the same protocol, there is currently no way to directly compare these coins in a single location. These statistics are essential to evaluate the relative health of both networks.

Features

Source - Website

Groestlcoin Transaction Tool

What am I?

This is a tool for creating unsigned raw Groestlcoin transactions and also to verify existing transactions by entering in the transaction hex and converting this to a human-readable format to verify that a transaction is correct before it is signed.

Features

SourceDownload

Groestlcoin AGCore

What am I?

AGCore is an Android app designed to make it easier to run a Groestlcoin Core node on always-on Android appliances such as set-top boxes, Android TVs and repurposed tablets/phones. If you are a non-technical user of Groestlcoin and want an Android app that makes it easy to run a Groestlcoin Core node by acting as a wrapper, then AG Core is the right choice for you.

What's Changed?

Source - Download

Groestlcoin Electrum

What's Changed?

Android Electrum-Specific

OSXWindowsWindows StandaloneWindows PortableLinux - Android
Server SourceServer Installer SourceClient SourceIcon SourceLocale Source

Android Wallet – Including Android Wallet Testnet

What am I?

Android Wallet is a BIP-0032 compatible hierarchial deterministic Groestlcoin Wallet, allowing you to send and receive Groestlcoin via QR codes and URI links.

V7.11.1 Changes

Groestlcoin Java Library SourceSource - DownloadTestnet Download

Groestlwallet

What am I?

Groestlwallet is designed to protect you from malware, browser security holes, even physical theft. With AES hardware encryption, app sandboxing, keychain and code signatures, groestlwallet represents a significant security advance over web and desktop wallets, and other mobile platforms.
Simplicity is groestlwallet's core design principle. Because groestlwallet is "deterministic", your balance and entire transaction history can be restored from just your recovery phrase.

iOS 0.7.3 Changes

Android v89 Changes

iOS SourceAndroid Source - Android DownloadiOS Download

Groestlcoinomi Released

What am I?

Groestlcoinomi is a lightweight thin-client Groestlcoin wallet based on a client-server protocol.

Groestlcoinomi v1.1 Desktop Changes

Groestlcoinomi Android v1.6 Changes

Groestlcoin Java Library SourceAndroid Source
Android DownloadWindows DownloadMac OS DownloadLinux Download

Groestlcoin BIP39 Tool

What's Changed?

Source - Download
submitted by Yokomoko_Saleen to groestlcoin [link] [comments]

A method of claiming bitcoin gold (BTG) coins right now

Hello all, I found a way to successfully claim my bitcoin gold coins, prior to main exchanges supporting them. I'm doing this using the Coinomi app - so if you have an Android phone step one is to go to Play Store and download this app. When the app is installed click on +COINS & select BitcoinGold. You will see they are currently worth £130 (~$170) each. This creates a bitcoin gold wallet within the coinomi app.
Now comes the slightly tricky part; you need to extract the private key from the wallet that held Bitcoin at the time of the recent BTG fork (which was a couple of weeks ago). if you are going to do this I would recommend moving your coins to a brand new wallet beforehand, because once the private key for your bitcoin wallet is exposed online I would consider that wallet to be vulnerable. Here is a guide from the coinomi support pages that tells you how to extract the private key from different wallets ( it was written for the Bitcoin cash fork but the principle is still the same)
https://coinomi.freshdesk.com/support/solutions/articles/29000013719-how-to-get-bitcoin-cash-from-many-wallet-software-services-with-coinomi
At the bottom of this article, you will see an attachment for a BIP39 tool. You need to download this and in the box that says "BIP39 mnemonic" - you enter the 12 word seed for your bitcoin wallet. If you done look further down on this tool you will be provided with a list of public keys and private keys for that wallet. Select and copy the private key ( which for me was the first address line at the top)
Now go back to your coinomi app and the newly created bitcoingold wallet. Click on the menu in the top right corner and select "Sweep Wallet" - you are then presented with a screen that asks for a private key. Paste in the private key you have just extracted from the BIP39 tool & hey presto you should see your bitcoin gold coins (1 BTC = 1 BTG)
The coinomi app is really good as supports over 80 different coins. You can now decide whether to keep your bitcoingold or exchange it for another coin...
The steps ive listed above are all very new - not many people will have done this yet and certainly none of the main exchanges have freely issued people with bitcoingold coins yet.
submitted by heniferlopez to BitcoinMarkets [link] [comments]

DogeCash Development Update #2

Welcome Doges to our 2nd installment of our weekly developmental updates. We have a few exciting items to talk about!
HD Wallet is being added to our core code base. This is a BIP39/44 addition for creating a mnemonic seedphrase over a traditional password for your wallet.dat! Visit our GitHub to see this and our other progress. In addition to HD Wallets, we have added xPubKey and xPrivKey commands as well. These keys are for all used and unsued addresses your wallet will hold moving forward. The commands will get you the keys in your RPC Console.
The Team is also working on bringing a light version of BitNodes, but it will feature similar to BitcoinCash’s fork of BitNodes as seen Here. Alongside BitNodes, we are looking into BitCluster. Both of these tools will bring us more information on our network size, and different statistics. Showing us who is running what versions of wallets and how the network is spread across the globe. Bringing to us also more indepth block information to be able to go through your coins easier.
Last, but surely not least is we are going to talk about SignalHub, for those of you just tuning in SignalHub is our first of many platforms in the DogeCash ecosystem. It is a non-traditional Signal Trading platform. Traders can post/sell Signals for users to purchase/subscribe from their Traders they follow. We will be supporting select coins during the beta process, and expanding it daily throughout and until we go live. As well as support for many exchanges to bring a robust amount of choices for Signals listing and purchasing. Traders should have all they need in one place and the users will have the information they need from the good Traders! So join us for the closed-beta registration and enjoy the perks of helping us put together this platform and some extra free time when its complete! Beta SignUp.
That is it for this week. Aren’t you Doges excited to see whats next?
-The DogeCash Team
submitted by DogeCash to DogeCash [link] [comments]

Segwit wallets and Electrum

Electrum 3 is probably the first wallet to support native segwit (bech32) addresses. There are a few misconceptions regarding the different formats of segwit addresses that are in use right now. This post aims to clarify the consequences of using each type and explains advantages and disadvantages.
 
bech32/BIP173/"native segwit"
Bech32 is a brand new address format that has a few advantages over the current address format:
Most importantly, bech32 segwit addresses enable native segwit transactions for Bitcoin. Those addresses always start with bc1.
With such an address you can send to any and all wallets, exchanges and websites. However, currently (September of 2018) support from exchanges and some wallets to send to your wallet is still somewhat lacking, see Bech32 adoption. Please decide for yourself if that's enough for your needs.
To use these addresses, simply create a new wallet and choose "Segwit" as the seed type in the creation wizard.
 
segwit-in-p2sh/P2SH-P2WPKH
This is the address type that hardware wallets like Trezor or Ledger use. Addresses look like regular P2SH addresses, they start with 3. Without going into too much detail, this uses an old address type and uses segwit to spend from it. The advantage is that virtually all wallets already know how to send coins to this kind of address. One disadvantage is that to spend from those addresses, additional complexity is added to the transaction which makes those transactions slightly bigger (and thus more expensive) than native segwit transactions.
Electrum also supports this kind of addresses but you need to manually import a BIP39 seed with a BIP49 derivation path.
 
tl;dr. electrum's segwit wallets are GREAT! but for the short term, until other wallets upgrade, they will be a pain to use
submitted by jreuab to Electrum [link] [comments]

Groestlcoin June Development Update & Release!

Another Quarter, Another Release! The Groestlcoin production factory has been working overtime as always in order to deliver even more tech to push Groestlcoin mainstream when the time comes.
There have been many new fantastic wallets and exchanges added to Groestlcoins repertoire over the past 3 months so we will re-cap these before moving on to what is new today.

Recap

What's New

Re-forged: Groestlcoin Samourai

Groestlcoin Samourai is a wallet for the streets. A modern Groestlcoin wallet hand-forged to keep your transactions private, your identity masked, and your funds secure. Its main advantages are its extreme portability and is the most secure Groestlcoin mobile HD wallet.
We've built a wallet that Groestlcoin deserves. If you are looking for a wallet that Silicon Valley will never build, the regulators will never allow, and the VC's will never invest in, this is the perfect wallet for you.
![Groestlcoin Samourai Release Video](http://img.youtube.com/vi/i3WU8Tde8XQ/0.jpg)

Head over to the Groestlcoin Samourai Release Page here for the full release announcement.

New: GroestlImage

Groestlimage turns any file into a mnemonic phrase allowing users to generate Groestlcoin private keys and addresses based on the data URI of the provided file. A picture is worth a thousand Groestls.

Features:

Link

https://groestlcoin.org/groestlimage/

Source Code

https://github.com/Groestlcoin/groestlimage

New: Groestlcoin Core Config Generator

Groestlcoin Core Config Generator is a simple GUI to configure the groestlcoin.conf file – A developers dream tool!
Each configuration option is available via the user interface, grouped by what attributes they affect. For ease of getting started with a new configuration, a variety of preset "node classes" are available on the right-hand-side of the screen. Selecting a preset will load our recommended base configuration for a node fitting that description, at which point you can then tune the configuration at the single option level.

Features

Link

https://config.groestlcoin.org/

Source Code

https://github.com/Groestlcoin/groestlcoin-core-config-generator

New: Groestlcoin Dumb Block Explorer

Dumb Block Explorer is a trivial block explorer written in a single PHP file. Now everybody can run their own block explorer.

Features

Link

https://www.groestlcoin.org/explore

Source Code

https://github.com/Groestlcoin/dumb-block-explorer

New: Groestlcoin SMS Push TX

Groestlcoin Simple Push TX is a server to push Groestlcoin transactions via SMS. Now everybody can send new transactions via SMS if the Internet is not usable (i.e. blocked by government entities or becomes otherwise unavailable).

Features

Source Code

https://github.com/Groestlcoin/smspushtx

Update: Electrum-GRS 3.3.6

Electrum-GRS is Groestlcoins #1 thin-client for Windows, MacOS, Linux and Android, based on a client-server protocol. Supporting multi-sig wallets without the bloat of downloading the entire blockchain.

New Features (Universal)

New Features (Windows, MacOS, Linux)

New Features (Android)

Link

https://github.com/Groestlcoin/electrum-grs/releases/download
https://play.google.com/store/apps/details?id=org.groestlcoin.electrumgrs

Source Code

https://github.com/Groestlcoin/electrum-grs
submitted by Yokomoko_Saleen to groestlcoin [link] [comments]

r/Bitcoin recap - April 2018

Hi Bitcoiners!
I’m back with the sixteenth monthly Bitcoin news recap.
It's easy for news and developments to get drowned out by price talk, so each day I pick out the most popularelevant/interesting stories in Bitcoin and save them. At the end of the month I release them in one batch, to give you a quick (but not necessarily the best) overview of what happened in Bitcoin over the past month. Lots of gems this time around!
You can see recaps of the previous months on Bitcoinsnippets.com
A recap of Bitcoin in April 2018
submitted by SamWouters to Bitcoin [link] [comments]

Coffee Wallet, my wallet/portfolio app, now supports BTC

G'day /bitcoin,
In the latest version of my open source application, "Coffee Wallet", I have enabled Bitcoin support.
I started this project to make order in a mess in my crypto assets and there were no applications available that would fit my needs. I wanted an app that is both a wallet and a blockchain portfolio. I can easily keep track on all my assets regardless of where I keep them but also accept and spend most popular coins on the go and have my portfolio updated instantly.
Here are some Coffee Wallet features worth mentioning:
Homepage: https://wallet.coffee/
Google Play: https://play.google.com/store/apps/details?id=coffee.software.coffeewallet
App Store: https://itunes.apple.com/us/app/coffee-wallet/id1433984988
Github: https://github.com/fsw/coffee.wallet/
I will be glad to answer any questions and grateful for any feedback.
Thanks!
submitted by franciopl to Bitcoin [link] [comments]

PSA: Contrary to popular belief, you *CAN* create "normal" SegWit addresses (p2sh-wrapped-p2wpkh) in Electrum! The ones that start with `3` and are backwards compatible! Learn how inside.

I posted this yesterday, but it didn't get very much attention. This is huge, it makes it almost trivially easy for anybody with a computer to start using SegWit immediately.

Background

There are two main types of SegWit addresses. The "new" type is bech32, which start with bc1. You cannot send to bech32 addresses from older wallets that don't have proper SegWit support, including many exchanges and other Bitcoin-related sites.
The other type, p2sh-wrapped-p2wpkh, uses p2sh, which has been around since 2012, to allow SegWit to be used without sacrificing backwards-compatibility. These addresses start with 3. You can still send to them from older wallets. This is what basically all SegWit wallets except for Electrum use by default, because they still give you most of the benefits of SegWit and always "just work".
The Electrum developers justify using bech32 by default because transactions from bech32 addresses are slightly smaller (more scaling!) and have additional error-checks to protect against mistyping an address compared to p2sh-p2wpkh.
However, there is a way to use p2sh-wrapped-p2wpkh instead of bech32 with Electrum, it's just apparently not very well-known. It's not advertised anywhere in the Electrum documentation.

Guide

When creating a new wallet...
  1. Select "Standard wallet" type
  2. Select "I already have a seed"
  3. Click the "Options" button, and check the "BIP39 Seed" box
  4. Now you need to generate a new seed. There are many sites that you can do this on; a well-trusted one is https://iancoleman.io/bip39
  5. Change the derivation path to m/49'/0'/0' on the next page. This tells Electrum to use BIP49 (p2sh-p2wpkh) instead of the default BIP44 (p2pkh).
  6. Enjoy SegWit!

Video Demonstration

http://sendvid.com/9t4a11ly

How did I find it?

I stumbled upon this GitHub issue, opened by one of the contributors: https://github.com/spesmilo/electrum/issues/3462. It describes using a BIP 49 derivation path for p2sh-p2wpkh. I gave it a spin on testnet, and it works!
submitted by markasoftware to Bitcoin [link] [comments]

Groestlcoin Christmas Release!

Groestlcoin Dec 2018 Christmas Release Update

As per usual the 3 months has been all hand-on-deck, helping to bring further adoption utilities to Groestlcoin. The markets have been red but as always that doesn't stop the show from going on with regards to the development since the last release update on 24th September. Here's a recap of what has happened so far:

Recap:

What’s New Today?

Groestlcoin on Trezor Model T

As of the latest version of the Trezor Model T firmware, Groestlcoin is now officially supported! The Trezor Model T is the next-generation cryptocurrency hardware wallet, designed to be your universal vault for all of your digital assets. Store and encrypt your coins, passwords and other digital keys with confidence. The Trezor Model T now supports over 500 cryptocurrencies.

Blockbook MainNet & TestNet Block Explorer

Blockbook is an open-source Groestlcoin blockchain explorer with complete REST and websocket APIs that can be used for writing web wallets and other apps that need more advanced blockchain queries than provided by groestlcoind RPC.
Blockbook REST API provides you with a convenient, powerful and simple way to read data from the groestlcoin network and with it, build your own services.

Features:

Blockbook is available via https://blockbook.groestlcoin.org/ Testnet: https://blockbook-test.groestlcoin.org/ Source code: https://github.com/Groestlcoin/blockbook

Edge Wallet

Groestlcoin has been added to the Edge wallet for Android and iOS. Edge wallet is secure, private and intuitive. By including support for ShapeShift, Simplex and Changelly, Edge allows you to seamlessly shift between digital currencies, anywhere with an internet connection.

Features:

Android: https://play.google.com/store/apps/details?id=co.edgesecure.app
iOS: https://itunes.apple.com/us/app/edge-bitcoin-wallet/id1344400091?mt=8
Direct Android: https://edge.app/app

CoinID Wallet

We are excited to announce that Groestlcoin has been added to CoinID! With integrated cold and hot wallet support, and a host of other unique wallet features, CoinID can easily become your go-to wallet for storing Groestlcoin. More details can be found here: https://coinid.org/s/groestlcoin-wallet-overview.pdf

Features

Android: https://play.google.com/store/apps/details?id=org.coinid.wallet.grs
iOS: https://itunes.apple.com/us/app/grs-wallet-for-coinid/id1439638550

Groestlcoin Sentinel - Windows Released

Groestlcoin Sentinel is the easiest and fastest way to track balances of your Groestlcoin addresses.
Features
You can download it using the links below.
Download the Windows Wallet (64 bit) here: https://github.com/Groestlcoin/Groestlcoin-Sentinel-Windows/releases/download/1.0/SentinelSetup_x64.msi
Download the Windows Wallet (32 bit) here: https://github.com/Groestlcoin/Groestlcoin-Sentinel-Windows/releases/download/1.0/SentinelSetup_x86.msi
Source code: https://github.com/Groestlcoin/Groestlcoin-Sentinel-Windows/

Groestlcoin BIP39 Tool 0.3.9 Update

The Groestlcoin BIP39 tool is an open-source web tool for converting BIP39 mnemonic codes to addresses and private keys. This enables the greatest security against third-party wallets potentially disappearing – You’ll still have access to your funds thanks to this tool.
What’s New
Download the Groestlcoin BIP39 tool here: https://github.com/Groestlcoin/bip39/archive/master.zip
Source code: https://github.com/groestlcoin/bip39
Or use hosted version: https://groestlcoin.org/bip39/

Electrum-GRS 3.2.3 Update

Electrum-GRS is a lightweight "thin client" Groestlcoin wallet Windows, MacOS and Linux based on a client-server protocol. Its main advantages over the original Groestlcoin client include support for multi-signature wallets and not requiring the download of the entire block chain.
What’s New

Electrum + Android Version 3.2.3:

Android: https://play.google.com/store/apps/details?id=org.groestlcoin.electrumgrs
Windows & OSX: https://github.com/Groestlcoin/electrum-grs/releases/
Linux:
sudo apt-get install python3-setuptools python3-pyqt5 python3-pip python3-dev libssl-dev sudo pip3 install groestlcoin_hash sudo pip3 install https://github.com/Groestlcoin/electrum-grs/releases/download/v3.2.3/Electrum-grs-3.2.3.tar.gz electrum-grs
GitHub Source server: https://github.com/Groestlcoin/electrumx-grs
Github Source server installer: https://github.com/Groestlcoin/electrumx-grs-installer
Github Source client: https://github.com/Groestlcoin/electrum-grs

Groestlcoin ivendPay Integration

ivendPay and Groestlcoin cryptocurrency have announced the start of integration.
IT company ivendPay, the developer of a universal multicurrency payment module for automatic and retail trade, intends to integrate Groestlcoin cryptocurrency — one of the oldest and the most reputable Bitcoin forks into the payment system. Groestlcoin is characterized by instant transactions with almost zero commission and is optimal for mass retail trade where micropayments are mostly used.
According to Sergey Danilov, founder and CEO of ivendPay, Groestlcoin will become the 11th cryptocurrency integrated into the payment module. The first working vending machines for the sale of coffee, snacks and souvenirs, equipped with ivendPay modules, served the visitors of the CryptoEvent RIW exhibition at VDNKh in Moscow and accepted Bitcoin, Go Byte, Dash, Bitcoin Cash, Ethereum, Ethereum Classic, Zcash, Bitcoin Gold, Dogecoin and Emercoin. ivendPay terminals are designed and patented to accept payments in electronic money, cryptocurrencies and cash when connecting the corresponding cash terminal. Payment for the purchase takes a few seconds, the choice of the payment currency occurs at the time of placing the order on the screen, the payment is made by QR-code through the cryptocurrency wallet on the smartphone.
The interest in equipping vending machines with ivendPay terminals has already been shown by the companies of Malaysia and Israel, where first test networks would be installed. ivendPay compiles a waiting list for vending networks interested in buying terminals and searches for an investor to launch industrial production. According to Sergey Danilov, the universal payment terminal ivendPay for the vending machine will cost about $500. The founder of ivendPay has welcomed the appearance of Groestlcoin among integrated cryptocurrencies, as it is another step towards the realization of the basic idea of digital money - free and cross-border access to goods and services for everybody.
submitted by Yokomoko_Saleen to groestlcoin [link] [comments]

Hardware wallets FAQ

I have been reading a lot of misconceptions about hardware wallets the last few days, so I decided to make a quick FAQ that hopefully clears up a few things for people. I am definitely not an expert, but I have a solid tech background and currently work for a software security solutions company. I have done extensive research on security in the crypto space before I made my first transactions. Since I own a Ledger Nano S myself, some information might be about Ledger in particular, although I will try to keep it as general and simple as possible.
 
Some quick terminology used further on:
 
Q: Do hardware wallets provide extra security compared to other wallets?
A: Yes. Many people think that hardware wallets are only useful for convenience. While they are indeed very convenient to make transactions with, there is also a big reason to use them from a security viewpoint. When you generate a new wallet on your device, a new keypair is created, derived from the recovery seed. The private key is securely stored inside your device.
Now let's say you want to make a transaction from this wallet. You connect the device to your computer and you initiate a transaction. Instead of signing the transaction on your computer with the private key, the transaction itself goes into the device. The transaction is then signed (after verification) inside the device using the secured private key. Lastly, the signed transaction is transmitted from your device back to your computer where it can be sent to the network.
The key point here, is that YOUR PRIVATE KEY CAN NEVER LEAVE YOUR DEVICE, under any circumstance.
Let's compare this with some other common types of wallets:
 
Q: Hardware can fail. Do I lose my funds if my hardware wallet breaks down?
A: No. Hardware can indeed short-circuit, burn down or get eaten by your dog. Remember that there are no actual funds on your device. All it contains is your private key, which was originally generated from your recovery seed. If your device dies, simply import your recovery seed into a new wallet and the same private key gets generated again for you, giving you access to all the funds you had.
 
Q: What if the company producing my hardware wallet goes out of business and I can't buy new devices to replace my broken ones anymore?
A: Your recovery seed is not just generated from a bunch of words that that particular company has made up. Recovery seeds are generated from an industry standard protocol, which means that you can import the seed into any wallet that supports the standard. Ledger for example follows the BIP39 blockchain protocol, which is supported by a wide variety of online and offline wallets.
 
Q: Is it safe to use my hardware wallet with an infected computer?
A: Yes. Your private key is safe. Any private key related activity happens within a secure element on the device. Malware can not infiltrate and access your private key. The only thing malware can do is change the address to which you want to send funds right before the transaction enters the device. Both the TREZOR and the Ledger have a screen on which every transaction will be displayed, asking for your confirmation. You can easily visually verify if the transaction destination address is the address you want to send your funds to.
 
Q: How do I keep my hardware wallet safe?
A: The absolute most important thing about your hardware wallet is your recovery seed. Keep this safe at all times and never show it to anyone. You don't need to worry about the private key, since that's securely stored in the device anyway.
If your device gets stolen, no big deal. The thief cannot access your wallet without the pincode. If you forget your pincode, no big deal. Just regenerate your wallet using your recovery seed and pick a new pincode.
I would also advise adding a small extra layer of security by making a small variation in your recovery seed when you write it down. Swap around two words or better yet, replace a word by a different word from the particular protocol's word list (do not just make up a word yourself, it needs to be a word available within the protocol). Keep this extra security layer simple though, since you need to remember it. You wouldn't be the first one that got lost in his own masterfully fabricated security contraptions.
Some people don't even write down their recovery seed and just think they will remember it forever. Write it down, you will not remember it.
 
Q: What hardware wallet should I buy?
A: The most popular and reputable hardware wallets are currently Ledger Nano S and TREZOR. I would advise buying either of those. Which one is up to your personal preference. They are very similar from a technical viewpoint. I would argue the Ledger is a bit more user friendly.
 
Q: Where should I buy my hardware wallet?
A: If you want to be as safe as possible, buy it from the official website. Official retailers should be fine too. Do not buy anywhere else.
In the case of Ledger, if you buy a device, the box won't have any seals. Don't panic, that is completely fine, because the device itself is actually fully tamper proof. If an organisation had enough know-how to intercept your package, replace the firmware of your hardware wallet by some rogue software which would allow them to empty your wallet, don’t you think it would be trivial for them to duplicate and replace a piece of colored tape, giving you a false impression of security? Tampering with the device in any shape or form will simply terminate the device from being functional. No silly seal nonsense required. You can find more information on how this works technically here. The only way you can mess up purchasing your device safely is due to human error. An example is using a pre-generated seed that came with the packaging, as in the case of someone that bought a device on Ebay. ALWAYS GENERATE A NEW WALLET on the device.
   
Feel free to add any questions or corrections in the comments. I will try to keep this FAQ updated. You can also find me on Twitch or the PRPS discord under the username 'Pureacc'.
submitted by B4nshee to PRPS [link] [comments]

Best way to generate Monero Seed or keys to be ported to Ledger?

I have moved almost all my crypto other than Monero to addresses associated with my 24 word BIP39 mnemonic I use with my Ledger Nano S. Up until now I have stored my Monero on mostly exchanges (I know...) because of the complexities of securing it offline and tracking address balances. I am in the process of finally coming up to speed about the details of how to do this with the tools today, but I would like to come up with a solution that is compatible with the Ledger Nano S once it is officially supported.
Is there a good way to use some information from the standard Bitcoin HD mnemonic so that my Monero Keys can be generated from the same information? I found this Monero Wallet Generator that uses Dice for entropy. I saved the dice rolls used to generate my standard BIP39 menominc that I use for other cryptocurrencies (plus it can be work back from the seed with the knowledge of the dice roll method I used), so I was thinking of just using this tool with the first 96 dice rolls used to generate my non-Monero seed. Has anyone used this tool before, and can it be trusted? I t looks like the creator "JollyMort" is a Monero contributor, so I assume the third party risk is minimal.
The other thing I was thinking is use number the BIP39 and convert to the Monero dictionary, wrapping around if the number is larger than 1626.
Do one of these methods seem reasonable? Is there a better way to do this? I am assuming there must be some standard way that the Ledger wallet will be doing this conversion with a standard BIP39 seed internally to enable Monero support. Does anyone know how this is being done?
submitted by CryptoQnt to Monero [link] [comments]

A cryptoforker's guide to free money - Part 1 (The holy ymgve script + what and where to exchange)

EDIT: a new version of this guide, multilingual and featuring a wallet checker (input your IP, see what you can fork and how much it is worth) is available at https://cryptodom.org

Hello my lovely forkers!
A while ago I made a post A cryptoforker's guide to free money - Part 2 (Coinomi, Bither, Bitpie, Walleting Services) where I explained how I used a combination of COINOMI and BITPIE (together with DIG WALLETING SERVICES) to get hold of most forked coins - And then how I sold them (main sites used: GATE.IO / BTCTRADE.COM / BIT-Z.COM / EXRATES.ME / COINEX.COM). Please refer to that for the instructions regarding Bither and Coinomi.
QUICK NOTE: If you are a seasoned forker, just look at point 4 and see if your pokem… I mean fork coins collection is complete :-p / If instead you are a total newbie, remember you can just do the “PREPARATION” part and then claim through DIG WALLETING (affiliate link: https://dig.walleting.services/#/aff/o5YP75ALDORdaAbmrJJx NON affiliate link: https://dig.walleting.services/# ) if the process is too hard/long/risky - these guys are reliable and provide a great service, especially for those who have a plethora of transactions and would need to hunt down every last key manually - they have a Reddit, too: you can reach them at Walleting_Services .
BEFORE YOU START: What is a fork? Is it really free money? Imagine you had a bank account at BTCbank and a card for it. Tomorrow BTCbank splits and half of its branches become BTC2bank. Nothing changes for you as a client of BTCbank, however there is something you can now do. You can move your money from your BTCbank account to a new BTCbank account, in practice making the card for your former account useless in the BTNbank branches but… NOT IN THE BTN2bank branches! So you can go there and get the equivalent of what you had in “free” money. Nothing illegal, nothing shady, no bugs or exploits: it’s all there by design. Keeping with the example though, it should be specified that you must have the “card” of your BTCbank, which in this case is a private key. If you have your BTC stored on papehardware wallet or anywhere else where you are in direct control of your private keys, well done! Those keys are your BTCbank card(s). If, on the other hand, you held your money on an exchange (Binance, Bitfinex, Bittrex, you name it), then your only chance is to wait and hope that the exchange decides to support the coin and gives you your share. It’s not impossible but it introduces a middleman. It’s like you are asking your uncle to have an account in his name at BTCbank and there is no guarantee that uncle will go to a new branch of BTNbank2 and use the card trick to get the free money and give it to you, no matter how much you ask him to. He could do it, he could not: it’s uncle’s call.
PREPARATION: First of all, a question: are you after the fork money to exchange it yourself or do you just want to claim it but want someone else to do all the exchange part for you? If you want to squeeze every last bit out of it, get ready to sign up to a few Chinese exchanges! You might as well do this now before you start, otherwise you’ll get stuck at the cashing part. Same goes for the script. No target address, no script. I warned you :) Anyway, here’s the list: • GATE.IOBTCTRADE.IMCOINEX.COMEXRATES.METRADESATOSHI.COMBIT-Z.COM
My personal favourite is GATE.IO, despite the 60 confirmations (up to 14 hours), but they all helped me one way or another, and most importantly they all allow withdrawal (BTCTRADE.IM wanted verification papers, the others didn’t). Also, make sure to have Coinomi, Bither and Bitpie installed on an Android phone.
STEP 1 - THE GOLDEN RULE Just like in the previous post, let me start off by warning everyone: what are you about to do is dangerous. You could lose your bitcoins. Are you scared? You should be, cause the threat is real. Nobody wants to lose 1 BTC to try and claim a few tens/hundreds of dollars, right? So, first and foremost, make sure that you MOVE your coins from wherever they are (ideally, an offline wallet like a ledger or a trezor), and then, once the wallet is empty, feel free to play around with its private keys, that will hopefully show some transferrable balance at the time of the fork.
STEP 2 - GETTING YOUR KEYS - https://iancoleman.io/bip39/
For getting the keys, this is your number one option - with an offline version for paranoid available, no less. Use the seed (those 24 words in the case of ledger, for example) and after the calculation go get your keys in the chart at the end of the page. In case you have segwit addresses or special scenarios (like a wallet with a lot of operations over a long time), getting the keys, or the “right” keys, might take a while. Anyway: let’s look at the first line of the chart. In the first column you will find the address: copy and paste it onto https://blockchain.info/ and press enter to get the transaction history for that given address. Let’s suppose for the sake of this example that our address shows 2 transactions: one inbound for 2 BTC 1 year ago and anther one for the outgoing BTC 5 minutes ago (because before we started this we DID move them out, right?!?). What that means is that at the time of the forkS (in this case we’d get money from most of them) we had 2 BTC on that address. Great, so it’s loaded, and we need its key. Let’s go back to the chart on line one and let’s have a look at the third column: this is our private key. We will use it later to sweep or import in the various method outlined.
STEP 3 - THE SCRIPT - https://github.com/ymgve/bitcoin_fork_claimer
If you have ben around this subreddit long enough you surely read about the script… And spared a tender thought for ymgve who made this possible. Yet, no one really explains properly how to use it. Unfortunately I do not have the time to explain how to get python installed and running on a machine, you will have to figure it out on your own. Same goes for the fact that you might need to write “py” or “python” before the actual “claimer.py (…)” command. Let’s say you somehow get ready to run the script - now you do have a series of examples on the github page, but they are not so easy to understand for the uninitiated. Here is the relevant quote:
In blockchain.info mode it uses the blockchain.info API to query and validate information about the transaction you're spending from. This only works for transferring/claiming coins that existed on the BTC main chain pre-fork. SYNTAX: * claimer.py * EXAMPLE CLAIMING BTG - BITCOIN GOLD: * claimer.py BTG 4adc4(...) 5K2Y(...) 1HKqKTM(...) 1aa5cm(...)*
Let’s have a look at the example and remember what we did before in the “preparation” and “getting your keys” sections. In the former, we signed up at the exchanges so we now have the relevant deposit addresses, right? So let’s say we want to get fork XXX : let’s look for a deposit address of XXX and let’s call it DEPOXXX - Next, (hello, blockchain.info – here’s my wallet address from column one) we’ll look for the transaction ID (TRANSXXX) of the wallet (WALLETXXX) we have the private key of (PRIVATEXXX). We have it all now, so our script will be:
claimer.py XXX TRANSXXX PRIVATEXXX WALLETXXX DEPOXXX
Admittedly, there is a more complicated method for FBTC and also some kind of manual mode to transfer just parts of the sum and set the transaction fees, if you need those, good luck :)
Also, I was contacted by ottoteixeira who reminded me he created a very useful script (I actually used it during my first attempts) - What it does is to create the scripts to run on ymgve's script. A script for the script, right - sounds complicated but it actually makes your life easier once you understood what you are doing. Give it a try: Otto's script - (requires minimal coding skills to edit the file with your own data)
STEP 4 - WHICH EXCHANGE FOR WHAT? SCRIPT/APP CLAIM:
BCH/BTG - Claim with Coinomi, move to Binance
SBTC/BCD - Claim with Coinomi, move to gate.io
CLAM/BTX- Claim with Coinomi, move to bit-z.com
BTP/BTN/BTW/BTF - Claim with Bither and exchange with Bitpie (move them to the bitpie bank once they cleared to be able to trade on the exchange)
B2X - Claim with script straight to exrates.me
BPA- Claim with Bither, no exchange accepting deposits so far
BTW - Claim with Bither, move to btctrade.com
BPA - Claim with Coinomi, no exchange accepting deposits so far
UBTC - Claim with script, send straight to btctrade.com
CDY - Fork of BCH, untested but should work with script straight to bitpie
BTV - Claim with script straight to coinex.com or bit-z.com
OTHERS:
LBTC - Claim with the online wallet (http://lightningbitcoin.io/ ) (download, run, sweep keys) - can be traded through cryptosnake
LCH - Claim with online wallet (https://litecoinca.sh/#download ) (download, run, sweep keys) - can be traded on tradesatoshi.com
BTCP – I haven’t claimed it yet but some people seem to have made it. To keep up with the news, I follow the #bitcoinadrops discord channel, they talk about it and they are hilarious ☺
UPDATE: Can be claimed with Coinomi (only non segwit though, so I can't test at teh moment). Many successful reports of claiming already. First price I've seen was 0.002 - seems low compared to the hype. I was hoping for 0.02 :-p
NO LUCK HERE:
BCK/BTSQ/BTT/WBTC - Claimable through the script apparently, I haven’t tested cause I have no target address
BTH/BCX - I am yet to find an address where to send them to :(
STEP 5 - FINAL NOTE: Oh no! After 2 days of python, apps, furious coin creation and shady Chinese exchanges you are done. Bonanza is over. Not quite! Here is a little reminder of where to find the info you want and need about the forks -
• cryptodom.org - start from here, always
BitcoinAirdropsTrades - end up here if you are the kind of person who wants to pre trade forks the moment the wallet hits Github :)
And that is all, folks :) Feel free to ask me questions if you are stuck or something is not clear, and I will try my best to answer you. If I helped you, feel free to tip your humble fellow forker here—>
•BTC tip jar: 1BEAADXCk3ng2ZRsinHmwVyZQf1Vu9AcDj
•LTC tip jar: LYT1sbotLuUtU5v5r9uEu61xoGpJ1s4aau
Oh and one last thing… I did help 4 people to sell some of their forked coins, two of them from Reddit. They are binsone and whospumpin. A lot of people are helping, I know… camku Playboy_BTC cryptosnake eliteluxurytrades - Personally I used cryptosnake twice and he was fair and square with me: honestly, all these guys can do some coins I do not handle (LBTC / LCH and even BTCP) - but hey, I am still your favourite one cause I showed you how to do it yourselves, no? So if you are being lazy, let me work for you and let’s share your profits at the usual rate of 5% (over 2k) / 10% (less than 2k) commission :-)
submitted by crytposhadow to BitcoinAirdrops [link] [comments]

Here is how to create SegWit BIP49 wallets and addresses in Electrum.

Posted this earlier as a comment in /bitcoin -- hopefully this can help some of you here as well.
So, with the way Electrum sets up SegWit wallets, most mining pools and exchanges don't yet recognize the addresses. This is because Electrum uses "full-SegWit" bech32 implementation.
In order to work around this, you can create the more "backwards-compatible friendly" BIP49 implementation of a SegWit wallet via Ian Coleman's website then import into Electrum.
The downside to the BIP49 implementation is that your SegWit transactions are 10% larger than bech32 SegWit. The upside is that Slush Pool and loads of other sites will send those sweet BTC payouts to a BIP49 address.
Here's a step-by-step.
Note: Please take all available security precautions when generating your seed--VPN, https, firewalls, etc.
  1. Go to this site
  2. Click "BIP49 derivation path" and generate. Those fifteen words are your wallet seed.
  3. In Electrum, FileNew/RestoreStandard wallet and click "Next"
  4. Select "I already have a seed" and click "Next"
  5. Click "Options" box and check "BIP39" Seed then click OK
  6. input fifteen words from Ian Coleman's site and click "Next"
  7. On the "Derivation" screen, replace m/44'/0'/0' with m/49'/0'/0' and click "Next"
  8. If you want wallet key encryption (STRONGLY RECOMMENDED) enter a strong password and store it somewhere safe, then click "Next"
  9. Look at your wallet's addresses: they should all begin with "3" (if they don't, start over with a new seed).
  10. Enjoy your new SegWit backwards-compatible P2SH-P2PKH wallet.
Donations: 3LQ2QWQHcYaCAfNXBuoXygmsKAGGJEa7rW
EDIT: If you have a Trezor or Nano S with Segwit, you can basically follow this guide without any Seed Generation and replace "I already have a seed" in step 4 with "Use a hardware device."
submitted by bantership to Electrum [link] [comments]

16. COLDCARD Passphrase (BIP39) features. Using it, Locking it down, and encrypted MicroSD. Bip39 forgotten seed last word 2019 Improved Keepkey Setup Guide (24 Word Seed, BIP39 Passphrase, Electrum. Works for Trezor) COBO Tablet for Backing up Mnemonic Seed Phrases for Bitcoin Wallets bip Mnemonic amazing 9 in 1 tool

BIP32, BIP39 & BIP44. The recovery procedure, however, is not too obvious, as it is necessary to make some distinctions based on the standard of seed adopted. There are several, including BIP32, BIP39, BIP44 and also BIP43. Typically, most cryptocurrency wallets use the first three. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, ... I have the bitcoin and ethereum public addresses for this mnemonic. I am wondering if it's feasible to brute force the passphrase. Each word is 11 bits (2^11 = 2048 possible words). The last (24th) word of the passphrase is of the following form [3 random bits][8 bit checksum]. Therefore I only have to check 2 ... It's for Bitcoin (BIP39 to be exact), and is going to be running in conjunction with pybitcointools, however I believe the commented URLs should be somewhat self-explanatory. Background info: In essence, a hex value (the seed) is converted to binary, divided into chunks of 11-bits, and the base 10 value of each binary chunk is used as an index in a list of 2048 words. Bitcoin is one of the most important inventions in all of human history. For the first time ever, anyone can send or receive any amount of money with anyone else, anywhere on the planet, conveniently and without restriction. It’s the dawn of a better, more free world. Why our Exchange is NON-HACKABLE. Most of the world’s top most exchanges use third party API for faster crypto transactions ... Bitcoin Improvement Proposals. Contribute to bitcoin/bips development by creating an account on GitHub.

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16. COLDCARD Passphrase (BIP39) features. Using it, Locking it down, and encrypted MicroSD.

Bitcoins do not require banks or third-party financial services to act as central clearing houses for electronic transfers. In essence, Bitcoin technology “cuts out the middleman”. Bitcoin is ... A video looking at the an improved procedure to set up a Keepkey, this basically uses Electrum to initialise it with a full 24 word seed, to verify the seed and also to enable a BIP39 passphrase ... for trading bitcoins in a world-class non-hackable exchange visit www.iconbtcxchange.com NOW CHECK 12 WORDS bip44,49,84 bip 84 is bch address bip49 is multisig address starts with 3 18 words bip ... Ian Coleman's BIP39 Tool: ... If you are new to Crypto, my suggestion is that you start with buying ~$150 worth of Bitcoin, Ethereum, Litecoin @ Coinbase and get familiar with storing it, moving ... In this video you will learn how to add a BIP29 Passphrase (a.k.a. "25th word"), how to enter it for signing transactions, how to use the option passphrase lockdown and the optional encrypted ...

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