Explore famous unsolved cryptographic mysteries in this DEF CON conference talk where renowned cryptography experts delve into intriguing historical encrypted messages and artifacts. Journey through the fascinating world of uncracked codes, from the encrypted Voynich manuscript and Elgar's Dorabella cipher to the enigmatic Kryptos sculpture at CIA Headquarters. Discover lesser-known cryptographic puzzles including the NKrypt sculpture in Australia, a mysterious German silver cigarette case inscription, a WWII carrier pigeon's encrypted message found in an English chimney, a peculiar encrypted postcard from Luton's soccer team owner, and the cryptic messages of Henry Debosnys created during his 1800s murder trial. Learn about these compelling historical mysteries through expert analysis and detailed examination of each case, gaining insights into the enduring allure of unsolved codes and ciphers that continue to challenge cryptographers worldwide.