Prof. Dr. Kai Rannenberg holds the T-Mobile Chair for Mobile Business & Multilateral Security at Goethe University Frankfurt (www.m-chair.net) since 2002. Since 2004Kai is Coordinator of the EU Network of Excellence "Future of Identity in the Information Society" (FIDIS). Since March 2007 Kai is Cenvenor of the JTC 1/SC 27 / WG 5 "Identity management and privacy technologies". Kai's current research interests include Mobile applications and Multilateral Security in e.g. M-Business, M-Commerce, M-Banking, and Location Based Services; Privacy and identity management, communication infrastructures and devices, such as personal security assistants and services; IT security evaluation and certification. Denis Royer completed his diploma in business informatics at Braunschweig Technical University (Germany) in 2003. At the Chair for Mobile Business and Multilateral Security he was working on mobile identity management, decision support systems for the introduction of enterprise identity management systems (EIdM) process models. Currently he is an external PhD student at the Chair for Mobile Business and Multilateral Security, working for Sirrix AG in Bochum (Germany). Andre Deuker received his diploma in business administration from Goethe University Frankfurt in 2007. Since autumn 2007 he has been working as a PhD student and research assistant at the T-Mobile Chair of Mobile Business & Multilateral Security. Andre is editor and contributor of various FIDIS deliverables.