cryptologie.net

cryptography, security, and random thoughts

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Hey! I'm David, cofounder of zkSecurity and author of Real-World Cryptography.

More about me

I'm also an advisor at Archetype. I was previously a cryptography architect of Mina at O(1) Labs, the security lead for Libra/Diem at Facebook, and a security engineer at the Cryptography Services of NCC Group. Welcome to my blog about cryptography, security, and other related topics.

“Cryptologie” is the French spelling of “cryptology.”

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    My company is looking for interns

    blog

    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!

    suggested reads:
    → My internship at Cryptography Services in Chicago • blog
    → Looking for a crypto intern at Cryptography Services! • blog
    → /r/crypto wiki • blog
    ← back to all posts blog • 2025-02-25

    recent posts

    The API is English, the deterministic-agentic border is shifting
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    Looking for a cryptography audit? Here's where to go
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    What's next after soulbound NFTs? Self-willed NFTs via zkML
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    How to Make it in a Security Team
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    Getting Into The Zone
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    elsewhere

    book Real-World Cryptography Applied cryptography, from Manning. podcast Two And A Half Coins Crypto, banking & distributed systems. youtube Cryptography videos Concepts & security, explained.