The Unhackable Email Service https://www.youtube.com/watch?v=NM8fAnEqs1Q DEF CON 24 - Ladar Levison - Compelled Decryption: State of the Art in Doctrinal Perversity https://www.youtube.com/watch?v=JQiDGH2OW6k (Full track) https://www.youtube.com/watch?v=g_lN-RAfzRQ