How can I brute force decrypt my blockchain wallet?

1

Hi,

The webpage https://blockchain.info/wallet/wallet-format details how the "My Wallet" information is stored as a JSON object, and then encrypted using AES-256.

The webpage also explains how the private key is encrypted with a "secondary password".

When you attempt to Export your "My Wallet" information, you have the option to "Leave Private Keys Encrypted". This results in your private keys staying encrypted, and is displayed in a readable format similar to this:

"priv" : "ASDKFcqMh7jfsuLgtdMwvrw29lBjfaH3gshahklrQ+v9KOxFAULDljGV7SKTXQF7QL8KWqdcjjsgk95tlMYHHg=="},
"sharedKey" : "5ad12271-57d5-6ad8-79ce-49755a99f539",

The webpage also shows how encryption occurs like this:
var encryptedPK = Crypto.AES.encrypt(encrypted_pk, sharedKey + secondPassword);

I would like someone to explain how I can decrypt my "priv" key from the the ciphertext in the JSON object above.

I had assumed that I could simply plug the relevant...

0 0
2

your wallet & its master seed

When you create your Blockchain Wallet, a unique master seed is created. This master seed is the nucleus of your specific wallet, and is used to derive every individual bitcoin address that you'll use to send and request bitcoin.

Quick tip: Learn more about HD wallets here

CLIENT SIDE ENCRYPTION MEANS ONLY YOU HAVE ACCESS TO YOUR WALLET

We do not store your bitcoins, we only provide you with the software you need to store them yourself. Your wallet is encrypted on your device with your personal password. Your password acts as your decryption key to both lock and unlock your wallet — your wallet cannot be accessed without it. Because we don’t know or store your password (we can’t even reset it), only you are able to unlock and decrypt your wallet.

we've got your back(up)

Your encrypted wallet is automatically backed up to our servers. To safely store your wallet, we add another layer of security by encrypting your wallet a second...
0 0
3

LOGGING IN WITH YOUR WALLET ID

To log into your wallet you need your Wallet ID, your password, and any two-step verification that you have enabled. Your Wallet ID is a string of random letters and numbers that acts as a username. You can find it by navigating to the ‘Wallet Information’ section of your Settings menu. Although it looks similar to an address, your Wallet ID cannot be used to send or request bitcoin.

CHECKING YOUR BALANCE

You will always be able to see your bitcoin balance at the top of your wallet. Want to see your balance in your chosen currency instead? Click on your bitcoin value and it will display the fiat currency equivalent of your bitcoin.

SENDING & REQUESTING BITCOIN

To send bitcoin from your wallet, ask the recipient for a request address or scan their QR code.

To request bitcoin, you can share a link with the sender that has the amount, message, and address.

USING YOUR TRANSACTION FEED

All of your...

0 0
4

One of the more common questions our support desk receives from Blockchain Wallet users is, “Where can I locate my wallet identifier?”

In this post we’ll explain what your wallet identifier is, as well as why it’s important to keep a record of it. We’ll also guide you through the steps on how to locate your identifier using our web wallet and our mobile wallets on iOS and Android.

Understanding why your wallet identifier is important

A wallet identifier serves as a unique way for you to differentiate your Blockchain Wallet from others. A new identifier is generated every time a user creates a new wallet. Unlike bitcoin transactions that are viewable by anyone using a bitcoin block explorer, identifiers are not public and we recommend not sharing them with anyone, except for relevant support purposes.

A user can have many Blockchain wallets and will have a unique wallet identifier for each one. It can be helpful to understand the purpose of your...

0 0
5

A simple wrapper to decrypt bitcoin wallets by trying keys sequentually

Back in April 2014 my friend lost his bitcoin wallet password. He pretty much knew it, but he was missing a character here and there.
So I took this as a challenge to find different ways of solving this problem. I had a decrypt library in javascript, so I tried using node.js, web workers, phantom js and other means to get this to work. Eventually I did get his bitcoin wallet recovered :) I inputted a list of 1000 passwords or so to the app based on his hints, and it worked!

Excuse the mess, I never intended to share this with anyone, but I wanted to put it up as an example of some of the stuff I was playing around with.

Try it here:

And then there's the most powerful one, a multithreaded node.js version (tested with Node 4.4.2 LTS built using webworker-threads npm package). There is a property that controls how many threads you wish to run. By default it's set to 7.

Here...

0 0
6

Bitcoin is the currency of the Internet: a distributed, worldwide, decentralized digital money. Unlike traditional currencies such as dollars, bitcoins are issued and managed without any central authority whatsoever: there is no government, company, or bank in charge of Bitcoin. As such, it is more resistant to wild inflation and corrupt banks. With Bitcoin, you can be your own bank.

If you are new to Bitcoin, check out We Use Coins and Bitcoin.org. You can also explore the Bitcoin Wiki:

How to buy bitcoins worldwide
Buying Reddit Gold with bitcoin

Will I earn money by mining bitcoin?

Security guide for beginners - (WIP)

Community guidelines

Do not use URL shortening services: always submit the real link. Begging/asking for bitcoins is absolutely not allowed, no matter how badly you need the bitcoins. Only requests for donations to large, recognized charities are allowed, and only if there is good reason to believe that the person...
0 0
7
Moose33 wrote:

Hello,

4-5 years ago I set up a bitcoin account & deposited $$ onto it. Never used it (forgot about it). How do I recover my wallet? find my account? as it was an old computer.
I dont have any record of my wallet ID, but im sure I can find it through email confirmation?

Thanks for any advice

If the wallet is an online wallet, like Coinbase, then you should be able to recover the password via email confirmations like you stated. When you are signing in, press the forgot password button and follow the instructions given. Some sites also offer a secret question. If you input the correct answer, then you can access the account.

For certain wallets like electrum, they provide you with a 12-word phrase which can be used to recover your wallet in case of any loss. You normally get this when you create your wallet in the beginning. It is called a wallet seed. Have you by a chance saved this seed onto something...

0 0
8

We would like to thank you for coming to our website in your search for “Vpncoin Wallet Brute Force” online. You’ve probably noticed this many times where you generally distribute the nice word about crypto. “It’s not risky? What happens when the price failures? ” sofar, many POS programs provides free conversion of fiat, relieving some concern, but before the volatility cryptocurrencies is addressed, most of the people will be unwilling to hold any. We have to find a way to combat the volatility that is inherent in cryptocurrencies. For most users of cryptocurrencies it’s not essential to comprehend how the procedure functions in and of itself, but it’s essentially important to comprehend that there is a procedure for mining to create virtual money. Unlike currencies as we understand them today where Authorities and banks can just select to print endless quantities (I am not saying they’re doing thus, only one point), cryptocurrencies to be managed by users using a mining...

0 0
9

Just like with Bitcoin’s wallet.dat file that contains your wallet address and keys and that you need to backup for safety reasons, Ethereum also has a similar wallet file that you should have a spare copy of. With Ethereum the wallet file has a bit weird name and is not just called wallet.dat, but it has essentially the same purpose and the file works essentially the same way as the wallet.dat with Bitcoin and many other alternative crypto coins. Ethereum’s wallet file is stored in the data directory used by the client to store the blockchain and other files, the default locations for the datadir on different operating systems are listed below.

Default datadir locations:
– Mac: ~/Library/Ethereum
– Linux: ~/.ethereum
– Windows: %USERPROFILE%\AppData\Roaming\Ethereum

To get the full path of the data directory on your specific system you can run the geth console and type admin.datadir and you will see a result like on the screenshot above with the full...

0 0
10

Secure Your Bitcoin Wallet

If you don't have a Blockchain.info wallet, please see our guide "How to set up your first Bitcoin wallet and use the Bitcoin ATM".

Once you have done that, go into your Account settings. On the left side of the page, under Account Information, you will see Personal. Click on it, then enter an email address, an alias, and verify your phone number. The alias allows you to login with something memorable, rather than the long default string of characters. You can use something simple like your full name.

Under Personal, you will see General. Click on it, and set an inactivity logout time (I use 30 minutes), and set your Default Fee Policy to normal, or generous.

Under General, you will see Display. Click on it, and set your local currency. You can change the other settings if you like too.

Under Display, you will see Notifications. Click on it, and change the settings to whatever you...

0 0
11

Have you forgotten your Wallet Password?

Bitcoin and Ethereum wallets are normally encrypted by you, the wallet owner. However, sometimes you forget or misplace your wallet password. This is a bad thing! Unless the password is recovered, you have no way to access any funds stored in that wallet. That money is lost forever. At today’s exchange rate, that might be a lot of money.

Hopefully we can help you.

We have created a service that can take your wallet information, your best guess at your remembered password/passphrase, and attempt a brute force decryption of your wallet.

Impossible?

If you have no idea at all of your password, and it was more than a handful of characters long, then it is unlikely that we can help you. No-one in the world, including the NSA, CIA, D-Wave or anyone else can crack the encryption used in the Bitcoin or Ethereum wallet if the password is more than 15 fairly random characters. The wallet encryption is strong by...

0 0
12

Introduction

A wallet.aes.json downloaded from blockchain.info or emailed to on sign up contains everything needed to restore your bitcoins if blockchain.info is offline. The multibit desktop client is the easiest and quickest way to import blockchain.info wallet backups.

Download and Install Multibit

See how to install multibit.

Import the Private Keys

In the 'Wallets Wallets' side panel choose the wallet you want to import the private keys into.

Select the menu option 'Tools | Import private keys Import Private Keys'. The 'Import private keys Import Private Keys' screen appears.

Choose the private key file to import by clicking on the 'Import from. . .' button. A file chooser opens and you can select the wallet.aes.json file you want to import. Change the file type in the 'File format' drop down combobox.

If the import file is not password protected, the file is read and the...

0 0
13

Know how to create a blockchain wallet account to store your Bitcoins, later transfer to make money or pay for services

What is Blockchain Wallet?

Block chain is an online Bitcoin Wallet that allows any people to transfer bitcoins as a payment to any part of the world in just as easy as one – two – three steps.

It is a free service which makes easier to send and receive your Bitcoins without the need of Bitcoin client software.

It was first released in August 2011 that maintains the list of records involved in the bitcoin transaction.

Every user need to connect to a bitcoin network in order to transfer bitcoins. It is strongly protected by cryptography and hence it is merely impossible to crack.

If you want to know more about block chain wallet then you can read what Wikipedia says about Block Chain.

Here this article written to explain you about how to create a block chain wallet account?

It is just like your local...

0 0
14

Locating Bitcoin's data directory

The data directory is the location where Bitcoin's data files are stored, including the wallet data file.

Gnu/Linux

By default Bitcoin will put its data here:

~/.bitcoin/

You need to do a "ls -a" to see directories that start with a dot.

If that's not it, you can do a search like this:

find / -name wallet.dat -print 2>/dev/null

To change the directory Bitcoin stores its data in:

Run in terminal or script: ./bitcoin-qt -datadir=./[Directory_Name]

Mac OSX

By default Bitcoin will put its data here:

~/Library/Application Support/Bitcoin/

Windows

Go to Start -> Run (or press WinKey+R) and run this:

explorer %APPDATA%\Bitcoin

Bitcoin's data folder will open. For most users, this is one of the following locations:

C:\Documents and Settings\YourUserName\Application data\Bitcoin (Windows XP) C:\Users\YourUserName\Appdata\Roaming\Bitcoin (Windows Vista and 7)

If you have...

0 0
15

During the last couple of years, website ransomware has become one of the most actively developing types of malware. After infamous fake anti-viruses, this it the second most prominent wave of malware that makes money by directly selling “malware removal” services to users of infected computers. But unlike fake anti-viruses, that were mostly harmless, and used as a social engineering technique to make people pay for removal of non-existing threats, ransomware is a much more serious beast. It doesn’t pretend to be a good guy. It actually makes your computer unusable unless you pay the ransom.

So what happened? Why don’t we see large scale fake anti-virus campaigns any more while ransomware is all the rage? I guess the answer is the payment method.

Fake AV and Credit Cards

Fake anti-viruses pretended to be backed by reputable companies. To look legit they had to accept credit cards and thus work with banks. As a prevalent threat of that time (in 2008 alone...

0 0
16

A cool function of Bitcoin not mentioned in introductions is its message signing and verification feature. I'll use the Satoshi client on a Mac as the example but the same functions are available in the wallet at blockchain.info and in any decent Bitcoin client.

Suppose you have a dispute with a vendor you paid in bitcoin. They say you didn't pay them the correct amount or they didn't get paid at all. So you show them the record of the transaction.

Great, says the vendor, but how do I know that's your coin?

In the Satoshi client, go to the "Receive Coins" tab. At the bottom, you'll see an option that says, "Sign Message" (you can also go to File > Sign Message). Enter the Bitcoin address that you own that initiated the transaction (that's the address to the left of the green arrow in the transaction record mentioned earlier) into the address form. Write your message and then hit the "Sign Message" button.

The signature generated is unique to the address...

0 0
17

For Dave Bitcoin, the alias of the software architect that hacks people’s cryptocurrrency passwords, the price surge of Ethereum’s blockchain token ether has generated a significant amount of work; work that wouldn’t have been steered his way without his focus on developing trust.

And just to be clear, Dave Bitcoin hacks people’s passwords with their permission. He runs the website Wallet Recovery Services, which recovers people’s lost or forgotten passwords by brute force decryption – that is, using a computer program to try millions of passwords in a short amount of time.

He provides the service for bitcoin, litecoin and most other alternative cryptocurrency wallets, and in December, he began decrypting Ethereum pre-sale wallets.

"I love a challenge," said Dave Bitcoin, who’s pseudonym remains from the days when it was unclear if cryptocurrency was legal.

Dave Bitcoin told CoinDesk:

"Initially, back in mid-2013, I just wanted to...

0 0
18

Private keys have been an integral component of Bitcoin since its first description in 2008. Wallet software generally protects users from the need to understand what private keys are and how they work. Even so, most users eventually come face to face with private keys, too often with unpleasant results.

A basic understanding of private keys helps prevent loss of funds and other mishaps, but it can also offer useful insights into how Bitcoin works. This guide outlines the most important private key concepts for effectively using Bitcoin.

Bitcoin: A Secure Messaging System

Although Bitcoin is best known as a payment system, underneath it all runs a secure messaging system built on the Internet. Instead of relaying emails, texts, or web pages, the Bitcoin network processes value-transfer messages called transactions. Private keys play a central role in verifying these messages, identifying senders and receivers, and in securing the...

0 0