Early Bitcoin Core wallets used Berkeley DB to store keys. If the user set a passphrase, the master key was encrypted using AES-256-CBC. Cracking these files without the password requires immense computational power or specialized social engineering to remember the original password. Common Obstacles in Recovering Old Wallets He had made the backup and promised himself he’d remember the passphrase. "It's simple," he had whispered to the empty room. "Unforgettable." |