David Rupprecht received his B.Eng. in Computer Science and Telecommunications from the University of Applied Sciences for Telecommunications Leipzig, Germany, in 2012. He continued his studies with a focus on IT Security, Networks, and Systems and received his master’s degree 2015 from the Ruhr-University Bochum, Germany. Since 2015, David Rupprecht is a doctoral student at the Information Security Group of the Horst Görtz Institute for IT Security, Bochum. His research interests include mobile network security with a focus on access networks. His work explores implementation as well as specifications flaws in current and future mobile networks. In his daily work, he makes use of software-defined radios for the implementation of attacks and countermeasures.