bip38 - BIP38 is a standard process to encrypt Bitcoin and ...

Recover bitcoin private key in a password protected zip file

Ask for a friend. He bought 1.5 BTC back in 2010 and put it in a wallet with BIP38 encrypted private key and totally forgot about this until the price rose to 20K in 2017, he still has the paper wallet but couldn't remember any more the password to decrypt the private key. When created this wallet he barely understand how bitcoin works and just created a paper wallet following a tutorial he found on internet. The password is fairly long he vaguely remember.
Fast forward to 2020, he found in the old hard disk a password protected zip file name mybitcoinkey.zip which contains a .txt file. New hope arise but he wonder anyone can do a service to hack the file? Of course he is willing to pay part of the wallet to the guy.
submitted by Glue_CH to Bitcoin [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]

Moronic Monday, June 9th, 2014: Ask all your bitcoin questions!

Ask (and answer!) away! Here are the general rules:
And don't forget to check out /BitcoinBeginners!
submitted by BashCo to Bitcoin [link] [comments]

Mentor Monday, July 27, 2015: Ask all your bitcoin questions!

Ask (and answer!) away! Here are the general rules:
And don't forget to check out /BitcoinBeginners
You can sort by new to see the latest questions that may not be answered yet.
submitted by BashCoBot 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]

[Daily Discussion] Wednesday, May 27, 2015

Welcome to the /BitcoinMarkets daily discussion thread!
Thread topics include, but are not limited to:
Thread Guidelines
Other ways to interact
submitted by AutoModerator to BitcoinMarkets [link] [comments]

Service to sweep a private key and forward balance to a specific address

Hello,
I would like to know if there is any available application or service that will allow scanning a private key QR code and directly forwarding the balance to an address I own.
Similar to the noncustodial merchant solution Bitcoin Cash Register App but that will work with paper wallets.

Idea is to give family/friends/homeless/poor people a paper wallet tip that they can use it in an affiliate restaurant while the people there don't have to have a wallet. They will just scan the paper wallet private key and funds should go back to my address.

In simple: I make an agreement with a restaurant to accept my tips (I may pay in advance for about 10 meals), Cashier there use an app to sweep the private key on the tip and funds get forwarded back to me. Restaurant will deduct the meal price from the deposit I made.
It will help with crypto currency adoption IMO as many charity organization can benefit from on chain transactions without having to install fancy systems. With BIP38 password protected wallet it's also possible to lock funds to a specific merchant.
More info about the Bitcoin Cash Register App
submitted by Damascene_U to CryptoCurrency [link] [comments]

Special Case for Your Paper Wallet - Our New Business Idea Around Bitcoin, Feedback Needed!

Special Case for Your Paper Wallet - Our New Business Idea Around Bitcoin, Feedback Needed! submitted by 83tb to Bitcoin [link] [comments]

Time for a Game Plan

As we seem to be bouncing off some kind of bottom, with a backlog of good news about growth and capital, it feels like reality may be conspiring to set off another rise and for this I wanted to set out a game plan. Not a plan for making a shitload of money though that may be possible, a plan that has little to do with following every twist and turn of Bitcoin, but a plan that focuses on life and happiness. How can you survive a rise with some semblance of a normal life?
The price has been climbing for a week straight and while it could turn down any time, shit happens fast, and like an ER technician, you're going to need to react and depend on your mental preparedness to keep you from doing stupid things. You may be compelled to act in strange ways, not all of them positive. So these are some tips to survive another Bitcoin bubble, and Bitcoin itself on a personal, whole-life level.
  1. Keep a clear head. Yeah, I know, "Don't tell me what to do, man!" Quit doing whatever drugs you are doing and don't get into any new ones. During this time, increases may be adding thousands to your net worth in days, hours and minutes. Now, I don't know your particular relationship to money but each of us has a more complicated one than we can actively comprehend. Money is power. Time is money. It's heavy stuff. Time and bitcoins are things that, once wasted, you can't get back. When you find yourself with more money, even on paper it affects where you think you fit in the world, how you think of the future, what you can afford, your risk tolerance. I don't think most of us are setup to deal with so many things changing with that number so quickly. You will want a clear head to be able to follow whatever plan you setup and to deal with curveballs.
  2. Seek healthy ways to handle stress. This will reduce your chances of choosing less-healthy coping methods that sacrifice your intellectual clarity for short-term relief. Exercise. Meditate. Get a massage. Take up a hobby. Exercising the creative areas of your brain helps reduce, relieve, and process stress. Writing, coding, drawing, painting, sculpting, and cooking each provide an opportunity to do something new and to relieve tension. Carry a notebook to capture your ideas. Seek out challenging tasks. Spend time in natural settings with sunlight if you can find it.
  3. Keep your commitments. You don't need to calculate your net worth every hour. When the bubble is over and volatility reduces, you'll have normal life to deal with and you'll find money can't solve every problem it's possible to create during a fit of reckless exuberance. Keeping your committments means not allowing the market to reprioritize your schedule on short notice. People inevitably depend on you for things so keep doing those things. Trust takes years to build, seconds to break, and forever to repair. I speak from experience having effectively quit my job in a suboptimal way.
  4. Increase your security knowledge and improve your security practices. Any funds in online wallets should be minimized to just what is needed for trading. Reduce amounts stored in your own hot wallets to a minimum. Have a process to check and adjust this weekly or more often depending on just how much you're dealing with and your risk tolerance. Hacking attempts increase with the rise in price. 1 BTC sitting on a server at $200 is different than 1 BTC sitting on a server at $500 or $1000. The danger gloriously multiplies if one, ten, or one hundred BTC are currently within your comfort zone. Get a trezor or pick up an old laptop and repurpose it to run Tails or Ubuntu from a CD only (usually you can pull the hard drive and wifi card with just a screw driver). Prepare cold storage wallets, test them, and learn how to store them securely. Learn about BIP38, Shamir's secret sharing, encrypted disks, safes, and safe deposit boxes. If you can reduce your chances of being hacked, it's probably worth the time spent beefing up defenses.
  5. Prepare for taxation. Learn about capital gains tax. Besides federal or national capital gains tax, your state, province, county, or cell block may have additional tax to pay during profitable sales. Know your tax liability before you trade so you understand how much you need to set aside for the man.
  6. Be careful talking about your holdings or the profits you have tallied up on paper. When in doubt, don't talk about it. Techies are generally helpful people and when we think we've cracked the not-being-a-millionaire problem, it's very tempting to help others benefit. Unfortunately the ideal case, where you recommend someone "get in on this", they do, and then they sell for a quick profit seldom happens. More likely is that they buy at the top and hodl, blaming you for every nanosecond they are negative, possibly ending the nightmare by panic selling. And if they are wise enough to hold off on possibly purchasing at the peak, they'll either taunt you for being rich or will berate you for not acheiving stable lunar orbit. It's a no-win situation.
  7. Prepare for a rise ahead of time. Develop a version of this plan for yourself that you can follow or ignore with prejudice.
Hope it helps. Stay safe people.
submitted by zombiecoiner to Bitcoin [link] [comments]

Introducing the Keyois Capsule, a new type of physical Bitcoin. Better than cold storage, it's cold hard storage.

Hi everyone, my name is Jack, in the past I've gotten got my community college to host a short course on Bitcoin. (you can too!) and now I've made this new concept of physical bitcoins for some of you.
It's a cryptocurrency piggy bank. You can put funds into it but you need to break it apart to get funds inside; so it's tamper evident. It won't burn, rot, rust, melt, or otherwise lose data where so many other types of cold storage would.
I was unsatisfied with current methods of cold storage and so I decided to make myself something better. Click here to see problems with common methods of cold storage and why you should want something better
A backup seed or private key can be printed on paper or stored digitally but these mediums can be damaged by fire, time, water, and much more.
The Keyois Capsule is a tamper evident yet stylish way to keep a secret key safe from harm.
Benefits over a conventional paper cold storage wallet include:

The Keyois Capsule

Your BIP38 encrypted Secret Key (or otherwise encrypted backup seed) in engraved into a titanium ring. That is set inside another ring that bears the address. That is then put into a tamper evident and air-tight capsule with a elegant centerpiece of lab-created ruby or sapphire.
The end pieces are made of aircraft grade aluminium (al 6061) and surrounded by borosilicate (pyrex).
This product is designed mainly for those without access to multiple locations or land so that they cannot make split or multisig keys and they are forced to keep all their backups in one site.
It would have cost about the same to make 1 as to make 50, so I made 50 which also means you can buy one if you like them.
There are cheaper ways to improve your own situation, including: stamping or engraving on a piece of steel and securing that from wandering eyes. Be creative and have fun!
Here are some more professional photographs by videographer WordsmithJr and here is a long imgur album about me making the capsules. Oh, and here is another short album about making a capsule (not the capsules)
To order They aren't cheap, I wish they were but they weren't cheap to make. Price is $100USD worth of btc paid to only 13kqk3uk2b577KBSjZuwKQT3MGD9mEaVJC
To get the ball rolling I have made seven capsules available that are already ready-to-go that are available for sale without providing me with a encrypted key and address; I'll send you everything already generated and secured.
Everyone else, you must supply me with your address and BIP38 encrypted secret key or encrypted seed. If you don't understand this point then these are probably not for you.
Please re-read BIP38 and do some research on password strength and see this info about the pieces
Then message me with that information what what type of lab-created corundum you want.
21 red ruby stones remain
21 blue sapphire stones remain
6 generated by me ready to be sold
45 capsules remain available in total.
submitted by ProfBitcoin to btc [link] [comments]

Paranoid about losing coins...

Hi, fellow redditors. The paranoia is strong with me. The main reason i am so feared is that i have already lost all of my coins. This happened when i heard about first bitcoin ATM in the world. Then i started researching Bitcoin and i was thrilled about the amazing technology and the huge upisde potential of the price. I could not sleep for weeks until my Bitstamp funds received and finally bought my first bits, went all in with my extra money (price was already quadrupled). Meanwhile i had been learning how to make safe paper wallets and decided this was the way to go for me. Some time after making my 10 cold storage wallets and sending funds to them I realized my huge mistake. Instead of making brain wallets by typing random characters as passphrase and printing the wallets out I BIP38 encrypted them and lost my coins forever. I was depressed. I did not give up and started buying more bits month after month the price of 220 bucks. Now i have many time more bits than I initially did. Of course now i have tested the method i use for my cold storage with small and bigger amounts, but the paranoia remains. Also, this was one of the greatest lessons young investor could learn- try with small amounts first.
TL;DR- stupid me lost coins, now smarter, still paranoid
submitted by guudfella to Bitcoin [link] [comments]

[uncensored-r/btc] Guide to recover/sell your Bitcoin Gold

The following post by Zyoman (has been notified) is being replicated because the post has been openly removed.
The original post can be found(in censored form) at this link:
np.reddit.com/ btc/comments/7f17ml
The original post's content was as follows:
If you didn't know, there is a 3rd fork of Bitcoin... it's call Bitcoin Gold. As of this writing the price is around 290$ for each (about 3.5%). If you don't believe that fork will work (as I do), you can still sell them and buy Bitcoin Core or Bitcoin Cash.
Bitcoin Gold fork at block 491407 (October 24th). So if you had Bitcoin at that time... you have some bitcoin gold!
I suggest you use the wallet Coinomi, works on a cell. It's support Bitcoin Gold you can add the currency and then imports wallets.
  • If your wallet have a BIP38 (12 words) export, use it... that will save you time.
  • Electrum user, the seeds is not BIP38 so not compatible, you will have to import private key one by one (see next point)
  • If your wallet is the Core full node, if you have only a few transactions, you can use the export private key and importing them 1 by 1. Coinomi will create a transaction to import the funds. Fees are about 1¢ each.
  • If you have a big wallet, you can download the full client there is a build with the Bootstrap Torrent that will save you from long download.
Precaution
  • I did use VM because I don't trust those software.
  • Before importing keys, you can SEND them to another address on the both bitcoin and bitcoin cash so even if the app is malicious, it can't steal your money.
I have personnaly have been able to import all of Bitcoin Gold... I've trade them with HitBTC for Bitcoin Cash. There is no direct pair but you can trade to BTC or USDT and then to BCH.
Hope that help someone!
submitted by censorship_notifier to noncensored_bitcoin [link] [comments]

Paranoia and wallet security. Any thoughts about bitaddress.org's RNG?

I have an online wallet with 2FA. Problem is, as the price of bitcoin goes higher and higher, the value of my stash has crossed my level of "don't care what happens to it". I'm really anxious about the coins now and I only access my wallet from my home PC.
I'm thinking of moving all my coins to cold storage and bitaddress seems to be the best bet. However, it seems to use ARC4 for random number generation, which has had some issues. I would have loved it if it used a crypto-safe RNG. The idea is to print the BIP38 encrypted paper wallets and move my coins to them and have a watch-only address list in my wallet. (Yes, I'll keep a coin or two for day-to-day stuff in a warm address)
Any thoughts on alternatives to generate cold storage wallets?
submitted by no_face to Bitcoin [link] [comments]

08-21 11:02 - 'How I lost access to my wallet and recovered it' (self.Bitcoin) by /u/latioswang1 removed from /r/Bitcoin within 312-322min

'''
TL;DR
Today I learnt a good lesson by making my BIP38 paper passphrase too complex, too long and making a new password for each new wallet and each new transaction. And finally I was locked out of my own wallet.
Fortunately I just lost access for it for 2 days thanks to Dave Bitcoin and walletrecoveryservices.com. It's been risky on trusting someone with all my bitcoins after reading news and info about him for just 15min on Google. But given I'm been trying my luck on all possible passwords for the last 2 days and write my own bruteforce BIP38 cracking script with my vague memory of password, I surrendered. I turned in my wallet info to Dave, hoping he can find my passphrase and return my coins honestly.
After about 1 day, Dave came back with the right passphrase and took the agreed 20% (of my lifetime btc saving) comission in the wallet. I was actually pretty grateful of him though at the same time jealous of him making a good fortune out of my stupidity. Given BTC's historical increase in value, 20% can be gained back quickly, so I still think it's a fair deal.
A little more tecnhical detail here, I am a programmer myself so I did try bruteforcing the wallet before talking to Dave. I firstly figured out how to "test" if a passphrase is right given an btc address and a BIP38 encrypted private key. After that I implemented a dictionary generator based on my best guess of my passphrase, and I ran my passphrase test script over all the possible passphrase I've generated - just to realize it would take 3 day to 1 month to finish testing a very incomplete list of possible passwords on my laptop. And I don't know how incomplete or complete my dictionary is. I would be very upset if I can't resolve this issue asap and I was kinda already mad. Though I think I know how to build a distributed batch processing system on Amazon to speed up my wallet recovery, I am too upset to sit down and do it.
And fast forward to after Dave found my passphrase, I realized actually my memory wasn't too far off. So it won't take too much compute power to bruteforce my wallet as long as I keep trying slight variations of my wrong passphrase. If I were more deligent scaling up my script on AWS, it could have costed $30-$300 USD compute power to regain access to my wallet (depending on if the implementation is bad or really bad). But there's always a grain of luck and patience and risk in this task of wallet recovery. I may have never been able to recover it.
Well, after all, these are all post-moteum thoughts, just like people being regretful of not buying Bitcoin when the price were still $1 or $1000 or $3000.
I'd like to say thanks to Dave, and I'd like to spread the word about his service. Dave's wallet recovery "business" needs trust to work, so I am writing this post to remind me of my weakness and stupidity and to build up a little trust to Dave's wallet recovery service. Dave works with almost all cryptocurrencies and all kinds of wallet format.
I hope nobody ever have to use Dave's service, it's still a very stressful experience to the very least. Yet the fact that there's a trustable cryptocurrency wallet recovery service out there make me feel a little less stressful in using Bitcoin and feel better about the people who actually need to use wallet recovery service.
Happy HODL,
-S
'''
How I lost access to my wallet and recovered it
Go1dfish undelete link
unreddit undelete link
Author: latioswang1
submitted by removalbot to removalbot [link] [comments]

Introducing the Keyois Capsule, a new type of physical Bitcoin. Better than cold storage, it's cold hard storage.

Hi everyone, my name is Jack, in the past I've gotten got my community college to host a short course on Bitcoin. (you can too!) and now I've made this new concept of physical bitcoins for some of you.
It's a cryptocurrency piggy bank. You can put funds into it but you need to break it apart to get funds inside; so it's tamper evident. It won't burn, rot, rust, melt, or otherwise lose data where so many other types of cold storage would.
I was unsatisfied with current methods of cold storage and so I decided to make myself something better. Click here to see problems with common methods of cold storage and why you should want something better
A backup seed or private key can be printed on paper or stored digitally but these mediums can be damaged by fire, time, water, and much more.
The Keyois Capsule is a tamper evident yet stylish way to keep a secret key safe from harm.
Benefits over a conventional paper cold storage wallet include:

The Keyois Capsule

Your BIP38 encrypted Secret Key (or otherwise encrypted backup seed) in engraved into a titanium ring. That is set inside another ring that bears the address. That is then put into a tamper evident and air-tight capsule with a elegant centerpiece of lab-created ruby or sapphire.
The end pieces are made of aircraft grade aluminium (al 6061) and surrounded by borosilicate (pyrex).
This product is designed mainly for those without access to multiple locations or land so that they cannot make split or multisig keys and they are forced to keep all their backups in one site.
It would have cost about the same to make 1 as to make 50, so I made 50 which also means you can buy one if you like them.
There are cheaper ways to improve your own situation, including: stamping or engraving on a piece of steel and securing that from wandering eyes. Be creative and have fun!
Here are some more professional photographs by videographer WordsmithJr and here is a long imgur album about me making the capsules. Oh, and here is another short album about making a capsule (not the capsules)
To order They aren't cheap, I wish they were but they weren't cheap to make. Price is $100USD worth of btc paid to only 13kqk3uk2b577KBSjZuwKQT3MGD9mEaVJC
To get the ball rolling I have made seven capsules available that are already ready-to-go that are available for sale without providing me with a encrypted key and address; I'll send you everything already generated and secured.
Everyone else, you must supply me with your address and BIP38 encrypted secret key or encrypted seed. If you don't understand this point then these are probably not for you.
Please re-read BIP38 and do some research on password strength and see this info about the pieces
Then message me with that information what what type of lab-created corundum you want.
21 red ruby stones remain
21 blue sapphire stones remain
6 generated by me ready to be sold
45 capsules remain available in total.
submitted by ProfBitcoin to Keyois [link] [comments]

HIRING: Someone to help me develop BIP38.com into a useful site using bitaddress.org's github + design

Hi. I'm a crypto-junkie like most of you, and a huge fan of Mike Caldwell. I recently bought the bip38.com domain from a guy selling it on bitmarket
For those that don't know BIP38 is an encryption scheme developed by Mike to password-protect a private key QR code, thus removing the trust needed when sending paper wallet information to a cool paper-wallet maker like woodwallets or those cool metal versions I have seen. I want to make a giant BIP38 encrypted multi-hundred pound metal piece and hang it in my home one day and call it my vault, but that may be superfluous information about what type of a guy I am.
Many may know me from SealsWithClubs, but this project is just me. I want to make a useful site that helps bitcoin users quickly encrypt their own private keys with the BIP38 technology or generate new addresses (with optional BIP38 encryption) all the hard stuff is already done https://github.com/pointbiz/bitaddress.org
Want someone to design / build the site, but also to get creative with me about specs and tweaks.
I have bitcoins to pay / we can agree on an hourly or a project price depending on skill level and past works.
Get at me only if this type of project is seems like fun - I will only work with a developer that is excited about encrypting private key QR codes.
submitted by bryanmicon to Jobs4Bitcoins [link] [comments]

***The Crypto Factory Custom Cards***

We have received our sample custom cold storage wallets from the manufacturer.
https://bitcointalk.org/index.php?topic=576411.0
They look great:) These are great alternatives to traditional paper wallets, they are identical size to a credit card and the same material. You just need to supply us with your public keys to create a robust portable wallet. If you wish you can also send you BIP38 encrypted private key to print on the card.
You can number the cards in any way you wish. 1BTC, 5BTC, 10BTC, 50BTC whatever your requirements are, we can meet them.
They can be customized as follows:
They come in plastic wrapping and we have just placed an order for a custom leather wallet that holds 5 of these cards.
We are awaiting some custom usb's and coasters, will update the thread with some photos when they arrive.
The Crypto Factory does not go live until the 1st of July, however we are currently testing different shipping methods so are offering these on the forums to help establish the best shipping method.
Price: $5 per card Minimum Order: 5 cards Payment: Bitcoin or Litecoin Made and Despatched in: 5 days
submitted by thecryptofactory to Bitcoin [link] [comments]

How To Crack BitCoin 2019 What is BIP38 ? Buy Bitcoins with Paypal (Local Bitcoins option) No one can Hack bitcoin Private key Smart Wallet BitCoin, Credit Cards

Cracking Bip38 Encrypted Private Keys Of Bitcoins If you see any address with balance it could be your by importing private key into bitcoin wallet. How to crack bitcoin private key. There are random generated bitcoin private keys conver! ted into wif format and hashed to addresses. A private key is always mathematically related to the bitcoin wallet address but is impossible to reverse ... Enter BIP38 Passphrase. Key Formats: WIF, WIFC, HEX, B64, B6, MINI, BIP38. Your Bitcoin Private Key is a unique secret number that only you know. It can be encoded in a number of different formats. Below we show the Bitcoin Address and Public Key that corresponds to your Private Key as well as your Private Key in the most popular encoding formats (WIF, WIFC, HEX, B64). Bitcoin v0.6+ stores ... bip38 - BIP38 is a standard process to encrypt Bitcoin and crypto currency private keys that is less susceptible to brute force attacks thus protecting the user #opensource A bitcoin billfold represents a software program which stores bitcoin (BTC) $7183.47 -1.12% private keys. Usually, wallets are available hardware and software for, the former being generally known as a hardware wallet. On the whole, they ascend you access to your public Bitcoin address, often with Bitcoin Core and an internet connection, thus facilitating the shopping for and selling of ... 25 févr. 2015 - You may have heard the term BIP38 before , but what does it actually mean … What is BIP38 Encryption for Your Bitcoin Wallet ? Read More »

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How To Crack BitCoin 2019

BIP38 is a way to encrypt your Bitcoin private key with a password. For the complete text guide visit: http://bit.ly/2DBvzfK Join our 7-day Bitcoin crash cou... Bitcoin Halving 2020: History & Price Prediction (A Simple Explanation) - Duration: 12:33. CryptoCasey Recommended for you. 12:33. Gold will be explosive, unlike anything we’ve seen says Canada ... BIP38 Encrypting of your Bitcoin Private Key - Duration: 10:26. Matthew Smith 11,562 views. 10:26 . How to Recover Missing Bitcoins / Not Showing Up While Wallet Syncing - Duration: 7:03 ... Cracking Bip38 Encrypted Private Keys of Bitcoins Cracking bitcoin!!!! EASY MONEY! NO CLICK BAIT (2018) Online BitCoin Cracker - 100% Working Why Trump Is No Threat To Bitcoin - Blockstack ICO SEC ... BIP38 Encrypting of your Bitcoin Private Key by Matthew Smith. 10:26. Andreas Antonopoulos, Bitcoin Foudation, Fouder RootEleven LLC, Author by ID GC. 20:27. A Bitcoin Discussion with Andreas Antonopoulos by tastytrade. 20:42. Introduction To Bitshares by Bitshares Videos. 10:31. Bitcoin for Dummies: Why Bitcoin Is Not A Bubble by Reggie Middleton. 8:01. Basics of bitcoin by FasterTutorialsCom ...

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