This book constitutes the refereed proceedings of the 5th IFIP WG 11.11 International Conference, IFIPTM 2011, held in Copenhagen, Denmark, in June/July 2011.

The 14 revised full papers and 8 short papers presented together with the abstracts of 4 keynote talks were carefully reviewed and selected from 42 submissions. The papers feature both theoretical research and real-world case studies from academia, business and government focusing on areas such as: trust models, social and behavioral aspects of trust, trust in networks, mobile systems and cloud computation, privacy, reputation systems, and identity management.

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