Formal Aspects in Security and Trust [electronic resource] : Fourth International Workshop, FAST 2006, Hamilton, Ontario, Canda, August 26-27, 2006, Revised Selected Papers /

Strategic Games on Defense Trees -- Timed Calculus of Cryptographic Communication -- A Semantic Paradigm for Component-Based Specification Integrating a Notion of Security Risk -- Game-Based Criterion Partition Applied to Computational Soundness of Adaptive Security -- Measuring Anonymity with Relative Entropy -- Formalizing and Analyzing Sender Invariance -- From Simulations to Theorems: A Position Paper on Research in the Field of Computational Trust -- A Tool for the Synthesis of Controller Programs -- Where Can an Insider Attack? -- Maintaining Information Flow Security Under Refinement and Transformation -- A Classification of Delegation Schemes for Attribute Authority -- Program Partitioning Using Dynamic Trust Models -- Locality-Based Security Policies -- A Theorem-Proving Approach to Verification of Fair Non-repudiation Protocols -- A Formal Specification of the MIDP 2.0 Security Model -- A Comparison of Semantic Models for Noninterference -- Hiding Information in Multi Level Security Systems -- A New Trust Model Based on Advanced D-S Evidence Theory for P2P Networks.