security - BTC Leak

Steal our Bitcoin – Again

BTC Leak on June 16, 2020

Since the first round resulted in Bitcoin theft within seconds, we have decided to step up the game for the second round. Again, we have transferred 0.0001 BTC each to 10 different unsafe segwit addresses. Here is the transaction: c94be241769a2b95f0f14780c7c1612d0e86208e263f0b8e185110aa76f572c8… Read the full article

Import all private keys in Electrum the right way

BTC Leak on June 13, 2020

Our favorite wallet software Electrum requires a little help when importing a private key to include all its possible four public addresses. In other words the two legacy P2PKH adresses (one uncompressed, one compressed), one segwit P2WPKH-P2SH address, and one… Read the full article

SHA-256 in Bash and Python – A speed comparison

BTC Leak on June 12, 2020

When experimenting with generating Bitcoin private key and public address pairs, also widely known as brainwallet cracking (which is a subject that we will revisit many times), what you do is computing SHA-256 hashes of words, passwords or passphrases. You… Read the full article

How to prove control of a Bitcoin segwit address

BTC Leak on June 11, 2020

A well-known limitation with Bitcoin Core is that you cannot use the software to sign segregated witness (segwit) addresses, in other words, pay-to-script-hash (P2SH) addresses that begin with “3” or “bc1”. And if you cannot sign a message and ask… Read the full article