David Wong

cryptologie.net

cryptography, security, and random thoughts

Hey! I'm David, cofounder of zkSecurity, research advisor at Archetype, and author of the Real-World Cryptography book. 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.

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Kasumi

blog

kasumi

KASUMI is a block cipher used in UMTS, GSM, and GPRS mobile communications systems. In UMTS, KASUMI is used in the confidentiality (f8) and integrity algorithms (f9) with names UEA1 and UIA1, respectively. In GSM, KASUMI is used in the A5/3 key stream generator and in GPRS in the GEA3 key stream generator.

KASUMI

(and Katsumi/Katsuni is a very famous french porn actress)

suggested reads:
→ Asiacrypt • blog
→ What is GCM (Galois Counter Mode)? • blog
→ SIMD instructions in crypto • blog
← back to all posts blog • 2015-03-03
currently reading:
Kasumi
03-03 blog
recent posts:
New cryptologie.net
07-20 blog
Weaponizing AI Assistants: With Their Permission
07-20 blog
What are Schwartz-Zippel circuits? How do they relate to iterative constraint systems?
05-29 blog
Short Note On Montgomery Reduction: Why Operating Modulo b?
05-24 blog
Still confused by Plonk's permutation?
03-13 blog
📖 my book
Real-World Cryptography is available from Manning Publications.
A practical guide to applied cryptography for developers and security professionals.
🎙️ my podcast
Two And A Half Coins on Spotify.
Discussing cryptocurrencies, databases, banking, and distributed systems.
📺 my youtube
Cryptography videos on YouTube.
Video explanations of cryptographic concepts and security topics.