At the end of March 2022, we discovered a flaw in one of the core cryptographic building blocks of the Swiss Post E-Voting System, more precisely in the specifications of the recursive hash function it uses. Several system components which are critical to guarantee the confidentiality and the integrity of the votes, such as non-interactive zero-knowledge proofs and digital signatures, rely on this…
Currently, I am the founder and director of modulo p SA, a Switzerland-based company providing consulting services in the domain of applied cryptography, cryptography engineering and software protection. I am also an external lecturer at the University of Applied Sciences Western Switzerland and a member of the advisory board of CYSEC SA. Before that, I have been a senior manager for security…
BOOKS Gildas Avoine, Pascal Junod, Philippe Oechslin, Sylvain Pasini, Sécurité informatique - Cours et Exercices Corrigés, third edition, Vuibert, 2015. Augmented and updated version of the 2004 and 2010 editions. ISBN 978-2-311-40168-4. Pascal Junod, Anne Canteaut (editors), Advanced Linear Cryptanalysis of Block and Stream Ciphers, volume 7 of Cryptology and Information Security Series, IOS…