Jens Müller is a PhD student at the Chair for Network and Data Security, Ruhr University Bochum, Germany. His research interests are legacy protocols and data formats, for which he loves to investigate what could possibly go wrong in a modern world. He has experience as a speaker on international security conferences (Black Hat, DEF CON, USENIX, OWASP, IEEE S&P) and as a freelancer in network penetration testing and security auditing. In his spare time, he develops free open source software, for example tools related to network printer exploitation.