Hey! I'm David, a security consultant at Cryptography Services, the crypto team of NCC Group . This is my blog about cryptography and security and other related topics that I find interesting.

If you don't know where to start, you might want to check these blogposts:

BEAST: the CBC Attack on TLS
Maybe You Shouldn't Skip SHA-3
How to Backdoor Diffie-Hellman
Let's Encrypt Overview
Fault attacks on RSA signatures
Hash-Based Signatures: a 4-part Series

Here are the latest links posted:

21 Jul Chosen Ciphertext Security In Public-Key Encryption
21 Jul Horst Feistel - Cryptography And Computer Privacy (Scientific American, May 1973, Volume 228)
19 Jul Factoring The Noise Protocol Matrix
19 Jul Current Trends And Challenges In Post-Quantum Cryptography
18 Jul Opaque: Secure Apake (Pptx Slides)

You can also suggest a link.

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

Well done! You've reached the end of my post. Now you can leave me a comment :)

Anon

Great talk, but please defer chats with the audience next time ;)

david

ah yeah :) this talk definitely taught me to be faster to "take things offline"