Nicolas Courtois is a cryptologist and code-breaker, and a Senior Lecturer at University College London. For 7 years he worked as a cryptologist in a biggest secure hardware manufacturer in the world, Gemalto. Nicolas is a highly influential code-breaker and author with more than 100 publications and more than 5800 citations. His research focuses on the security analysis of cryptographic schemes with particular focus on realistic attack scenarios where the amount of data available to the attacker is very low. He is responsible for the cryptanalysis of many real-life ciphers used by hundreds of hundreds of millions of people every day, such as the Bluetooth cipher E0, the automobile cipher KeeLoq and the MiFare Classic Crypto-1 system which is very widely used in public transportation (e.g. Oyster Card) and building access control cards.