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 company is looking for interns posted 3 days ago

Check out https://blog.zksecurity.xyz/posts/internship-2025/

Looking for an internship in ZK, MPC, FHE, and post-quantum cryptography? Interested in working with AI, formal verification, and TEEs? We are always looking for talented peeps to join our team and do interesting research!

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My book Real-World Cryptography is finished and shipping! You can purchase it here.

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