Cryptographer, co-founder & chief security officer at Taurus SA. Books Cripto, indie (novella), 2025 Glitches, indie (short stories collection), 2025 Serious Cryptography, 2nd edition, No Starch Press, 2024 La Cryptographie Déchiffrée, Dunod, 2024 Petit Pingouin, indie (children's book), 2021 Crypto Dictionary, No Starch Press, 2020 Serious Cryptography, No Starch Press, 2017 + translations The Ha