Panagiotis Rizomiliotis received the B.Sc. degree in Informatics and Telecommunications in 1997, the M.Sc. degree in Electronics and Radio Engineering in 1999, and the Ph.D. degree in Cryptography in 2005, all from the National and Kapodistrian University of Athens. From 2005 to 2007, he was a Postdoctoral Researcher with KU Leuven, Department of Electrical Engineering (ESAT), and the COSIC Research Group. From 2007 to 2011, he served as a Visiting Lecturer with the University of the Aegean, Department of Information and Communication Systems Engineering, while from 2009 to 2012 he was also a Visiting Lecturer (Presidential Decree 407/80) with the Harokopio University of Athens, Department of Informatics and Telematics. From 2012 to 2018, he was an Assistant Professor with the University of the Aegean and concurrently served as an Adjunct Professor with the Harokopio University of Athens. From 2018 to 2023, he was an Assistant Professor with the Harokopio University of Athens, where he has been an Associate Professor since 2023. He has also been serving as an Adjunct Professor with the University of Piraeus since 2012 and with the University of West Attica since 2019, and as an Adjunct Professor with the International Hellenic University during 2015–2016. From 2009 to 2011, he served as a Special Advisor to the Ministry of Administrative Reform and e-Governance. From 2012 to 2019, he was a Member of the Plenary of the Hellenic Authority for Communication Security and Privacy (ADAE). Since 2019, he has been an External Expert Collaborator with the European Union Agency for Cybersecurity (ENISA). His research interests include cryptography, cybersecurity, privacy, and the security of information and communication systems.