The Bitcoin Brain Drain: Examining the Use and Abuse of Bitcoin Brain Wallets. - Marie Vasek; Joseph Bonneau; Ryan Castellucci; Cameron Keith; Tyler Moore 001 (Financial Cryptography, 2016)

Speed Optimizations in Bitcoin Key Recovery Attacks. - Nicolas T. Courtois; Guangyan Song; Ryan Castellucci (IACR Cryptol. ePrint Arch., 2016)