David Wong

cryptologie.net

cryptography, security, and random thoughts

Hey! I'm David, cofounder of zkSecurity, 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.

← back to all posts

How to Make it in a Security Team

blog

It was six years ago, when I joined the security team of Libra/Diem at Facebook. Two years later I was security lead and I had learned a huge number of lessons, some even life lessons.

I’ve been trying to motivate myself to record a vlog of some sort with some of the lessons learned during that time. It was a hectic two years during which I got my first gray hair, attended a house party with Mark Zuckeberg, grilled some s’mores on the Facebook campus while stalling all night to help announce the Libra project to the world at 6 AM, met a kidnapper as part as wanting to extend my crypto security circle, and wrote a book while traveling the US during covid.

But anyway, while I find the time and the will to record that one, I thought I would talk about a book that I rarely talk about, the security engineer handbook.

It’s a tiny read, with no bullshit and fluff, that contains a huge amount of learnings and gotchas that one should know about when joining a security team, and trying to make it, as a first timer. A huge amount of lessons I learned from are in that book, and I would recommend it anyone who’s in school and learning about security, or getting started in a security team, or working at a security team and wondering about the meta.

Anyway, it’s here.

← back to all posts blog • 2025-10-26
currently reading:
How to Make it in a Security Team
10-26 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.