Frank Hissen successfully studied Computer Science at Darmstadt University of Technology (Germany) focusing on IT security. For over 20 years, he works as IT consultant and software engineer. For over 15 years, he also works in various positions as security expert in IT development and consulting projects. He mainly worked for large businesses but also medium-sized companies. He develops software and system architectures for complex systems and implements them or supervises the implementation. Moreover, he creates studies and function specifications. In the area of IT security, Mr. Hissen is specialized in applied and technical IT security. For major as well as smaller companies, he equally developed and implemented security solutions and accompanied processes for secure product and software development. In the area of cryptography and encryption, Mr. Hissen developed security solutions as Senior Solution Engineer at SECUDE before he became self-employed in 2009. Since then he works as freelancing expert in the area of web and cloud application security. He creates secure conceptual designs of system architectures but also takes care of their secure implementation and corresponding security requirements. One other focus is the technical examination and validation of the actual implementation.