This book constitutes the refereed proceedings of the 22nd Annual IFIP WG 11.3 Working Conference on Data and Applications Security held in London, UK, in July 2008. The 22 revised full papers presented together with 1 keynote lecture and 1 invited talk were carefully reviewed and selected from 56 submissions. The papers are organized in topical sections on access control, audit and logging, privacy, systems security, certificate management, trusted computing platforms, security policies and metrics, as well as Web and pervasive systems.