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:

43632 Maybe you shouldn't skip SHA-3
08748 What is the BLS signature scheme?
24502 ASN.1 vs DER vs PEM vs x509 vs PKCS#7 vs ....
09231 The 9 Lives of Bleichenbacher's CAT: New Cache ATtacks on TLS Implementations
07443 Database Encryption
30696 Developers Are Not Idiots
13212 How to Backdoor Diffie-Hellman: quick explanation

Here are the latest links posted:

You can also suggest a link.

tl;dr of the sweet32 attack (On the Practical (In-)Security of 64-bit Block Ciphers) posted September 2016

I wrote about that 3-weeks-ago attack on the NCC Group's blog, but I had a bit more to say about it, so I made a tl;dr video =) enjoy!

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