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.

Awesome nmap cheatsheet posted December 2014

High on Coffee has released a cheatsheet on nmap. Full of examples and tips. You can find it here

EDIT: There are also Linux Commands for Penetration Testers there. The blog seems pretty new and it already has really good content :)

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

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