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:

06396 Proof of Elgamal's semantic security using a reduction to DDH
32316 Attacks on Ethereum Smart Contracts
08503 How to Backdoor Diffie-Hellman: quick explanation
19436 ASN.1 vs DER vs PEM vs x509 vs PKCS#7 vs ....
04871 Problems that UDP and only UDP has
12068 KangarooTwelve
51530 TLS, Pre-Master Secrets and Master Secrets

Here are the latest links posted:

13 Nov Tpm—Fail Tpm Meets Timing And Lattice Attacks
11 Nov Post-Quantum Tls Now Supported In Aws Kms
10 Nov Isogeny Crypto
08 Nov Maintaining Cryptographic Library For 12 Languages
02 Nov How Certificate Authorities Work (Comic)

You can also suggest a link.

Breaking beer ciphers posted April 2015

Apparently a beer was made with a cipher on it, and that is the story of one dude breaking it.

It reminds me a bit of the anssi logo challenge (in french).

Thx to my coworker Vitaly for the link!

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

ddddavidee

mauvais lien! ;-)

david

corrige merci :)