Nicolas Courtois is a cryptographer and senior lecturer at University College London. He has been studying cryptocurrencies for some time and has written a number of papers on bitcoin. His talk is titled “Cryptographic Security of ECDSA in bitcoin” in which he exposes the security vulnerabilities in the specific variation of the Elliptic Curve digital Signature Algorithm used in bitcoin.
Episode links:

Slides for this presentation
Nicolas Courtois’s Wikipedia Page
Personal blog
On The Longest Chain Rule and Programmed Self-Destruction of Crypto Currencies paper
Nicolas’s Bitcoin Publications

This episode is hosted by Sébastien Couture. Show notes and listening options: epicenter.tv/050