Hey! I'm David, the author of the Real-World Cryptography book. Previously I was the security lead for Diem (Libra) at Facebook, and a security consultant for the Cryptography Services of NCC Group. This is my blog about cryptography and security and other related topics that I find interesting.
My talk on SHA-3 and derived functions at DEF CON 25 posted December 2017
The talk I gave at defcon this year is online
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