Hey! I'm David, a security engineer at the Blockchain team of Facebook, previously 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.

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

04052 What is the BLS signature scheme?
07572 How to Backdoor Diffie-Hellman: quick explanation
13621 Common x509 certificate validation/creation pitfalls
04724 Tamarin Prover Introduction
10746 Zero'ing memory, compiler optimizations and memset_s
19309 Hash-Based Signatures Part I: One-Time Signatures (OTS)
10427 Key Compromise Impersonation attacks (KCI)

Here are the latest links posted:

17 Jul What’S The Matter With Pgp? (2014)
17 Jul Gpg And Me (2015)
17 Jul The Pgp Problem
16 Jul New Face Of The Bank Of England's £50 Note Is Revealed As Alan Turing
15 Jul Algorithmic Aspects Of Elliptic Bases In Finite Field Discrete Logarithm Algorithms

You can also suggest a link.

Markdown posted December 2013

I've changed the way I handle articles on this blog. I used to type plain html, but I'm now using the markdown syntax with the php parsedown parser.

So if you see any display errors, please tell me.

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