Cryptographer and author, with two decades in information security.

I design and break cryptography, and have led security operations, strategy, and governance.

I write technical books and fiction, and maintain bfSwA.blog.

Technical Books

No Starch, 2024
+ translations

Dunod, 2024

No Starch, 2020

No Starch, 2017
+ translations

Springer, 2014

Cryptography Designs

• Hash functions BLAKE, BLAKE2 (RFC 7693), BLAKE3
• Pseudorandom function SipHash (used in Linux, Rust, WireGuard, Bitcoin, etc.)
• Post-quantum signatures PRUNE-HORST, Gravity-SPHINCS, SPHINCS+ (FIPS 205, SLH-DSA)
• Password Hashing Competition (winner Argon2, RFC 9106)

Fiction

Novella, 2026

Novella, 2025

Short stories, 2024

Children's book, 2021

Misc

• awesome-post-quantum
• BLAKE3 visualizer
• Murphy's laws of cryptography
• Research satires
• Quantum merch store

Contact

• Signal (jpa.01), [email protected]