Marcus Niemietz is a co-founder of 3curity and security researcher at the Ruhr-University Bochum in Germany. He is focusing on web security related stuff like HTML5 and especially UI redressing. Marcus has published a book about UI redressing and clickjacking for security experts and web developers in 2012. Besides that he works as a security consultant and gives security trainings for well-known companies. Marcus has spoken on a large variety of international conferences.