This book constitutes the refereed proceedings of the 4thInternational Conference on Trust and Privacy in Digital Business, TrustBus 2007, held in Regensburg, Germany, in September 2007 in conjunction with DEXA 2007.
The 28 revised full papers presented were carefully reviewed and selected from 80 submissions. The papers are organized in topical sections on privacy and identity management, security and risk management, security requirements and development, privacy enhancing technologies and privacy management, access control models, trust and reputation, security protocols, and security and privacy in mobile environments.