Marek Sýs is a lecturer at Masaryk University in Brno, Czech Republic. Marek is a member of the Centre for Research on Cryptography and Security (Crocs) at Masaryk University aiming to improve security and privacy through applied research (often in cooperation with industry) and advanced education of future security professionals. His research interests cover randomness testing (he implemented optimized version of NIST STS testing suite, author of a powerful BoolTest) and public key cryptography (co-author of ROCA attack).