Tom Tervoort is a Principal Security Specialist for Secura, a security company based in the Netherlands. Tom regularly performs network pentests, web/mobile application assessments, as well as code, configuration and design reviews for large Dutch companies and institutions. Tom's primary areas of interest include cryptographic protocols and cryptography engineering, advanced web attacks and Windows AD pentesting. Besides doing security assessments, Tom also develops and gives cryptography and secure programming courses to software developers. In December 2020, Tom won a Pwnie award for Best Cryptographic Attack, due to his discovery of the Zerologon vulnerability. Tom has spoken at various conferences, including Black Hat USA 2021 and 2023, Black Hat Europe 2022 and ONE Conference 2021.