Dr.-Ing. Altaf Shaik, is currently a senior researcher at the Technical University of Berlin in Germany. He conducts research in telecommunications, esp., 5G radio access and core network security. He combines a professional background in programming, wireless communications and offensive network security. His renowned research exposed several vulnerabilities in the commercial 4G and 5G specifications and commercial networks that allow attackers to perform powerful attacks affecting millions of base stations, handsets, M2M and NB-IoT devices.