In the early days of Bitcoin, people used —passphrases like "correct horse battery staple" run through a hash function to generate a key. The idea was simple: remember the phrase, regenerate the key anywhere.
Attackers quickly created for brain wallets. They scraped every book, song lyric, Bible verse, and common phrase, hashed them all, and scanned the blockchain. If you generated your key from "password123" , your Bitcoin was stolen within seconds. btc private key generator
A proper BTC private key generator relies on with high-entropy sources. In the early days of Bitcoin, people used