# Bitcoins posted April 2014

I just gave a talk about bitcoins at my uni, here are the slides

Hey! I'm **David**, a security engineer at the Blockchain team of Facebook, previously a security consultant for the Cryptography Services of NCC Group. I'm also the author of the Real World Cryptography book. This is my blog about **cryptography** and **security** and other related topics that I find interesting.

I just gave a talk about bitcoins at my uni, here are the slides

If you don't know **where to start**, you might want to check these popular articles:

- - How did length extension attacks made it into SHA-2?
- - A New Public-Key Cryptosystem via Mersenne Numbers
- - Proof of Elgamal's semantic security using a reduction to DDH
- - How to Backdoor Diffie-Hellman: quick explanation
- - What are x509 certificates? RFC? ASN.1? DER?
- - Tamarin Prover Introduction
- - Database Encryption

Here are the latest **links** posted:

- 22 Sep Authenticated Key Exchanges
- 21 Sep An Explainer On Ed25519 Clamping
- 20 Sep Findora With Benedikt Bunz And Ben Fisch
- 19 Sep The Definitive Guide To “Modulo Bias And How To Avoid It”!
- 18 Sep Cryptofuzz - Differential Cryptography Fuzzing

You can also **suggest a link**.

I'm writing a **book**!

You can already start reading it in early-access, and the first chapters are for free!

Here are some random

populararticles:Here are some random

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