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Nicolas Béguier currently serves as the Head of Cyber Security at 52 Entertainment, focusing on enhancing security across an international group with diverse cultural and platform dynamics. As a co-founder of Tandem Technology, Nicolas specializes in simulating cyberattacks, identifying vulnerabilities, and developing training programs in advanced cryptography. Prior experience includes roles such as Security Architect and Offensive & Defensive Security Engineer at leboncoin, where infrastructure protection, penetration testing, and vulnerability management were key responsibilities. Nicolas has also contributed as a GIAC Advisory Board member, providing insights within the information security community. An education in Cryptology and Computer Security, alongside certifications in advanced web application penetration testing and CISSP, further supports Nicolas's expertise in the field.