Hey! I'm David, cofounder of zkSecurity and the author of the Real-World Cryptography book. I was previously a crypto architect at O(1) Labs (working on the Mina cryptocurrency), before that I was the security lead for Diem (formerly Libra) at Novi (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 first public report (since I left NCC Group) is out. It was work I did for zksecurity, auditing the Penumbra circuits. You can read it here: https://penumbra.zone/blog/2023-audits
It should be quite interesting to read as we found double spending and double voting issues. It's also nice because there are two reports in the post, one from us (zksecurity) and one from my previous team over at NCC Group =)
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My book Real-World Cryptography is finished and shipping! You can purchase it here.
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