DEF CON 23 Ryan Castellucci Cracking Crypto Currency Brainwallets

Imagine a bank that, by design, made everyone s password hashes and balances public. No twofactor authentication, no backsies on transfers. Welcome to brainwallets, a way for truly paranoid cryptocurrency users to wager their fortunes on their ability to choose a good password or passphrase. Over the last decade, we ve seen the same story play out dozens of times a website is broken into, the user database is posted online, and most of the password hashes are cracked. Computers are now able make milli