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.

Coinbase organizing a hackaton posted February 2014

We’re proud to introduce BitHack, an online hackathon open for all developers who want to create something great with bitcoin. No 24h time limit. No pain. Yes, with $18,000 in prizes..

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

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