Formal Aspects in Security and Trust (vol. # 3866) : Third International Workshop FAST 2005 Newcastle upon Tyne UK July 18 19 2005 Revised Selected Papers Voting Technologies and Trust On the Formal Analyses of the Zhou Gollmann Non repudiation Protocol Formal Reasoning About a Specification Based Intrusion Detection for Dynamic Auto configuration Protocols in Ad Hoc Networks A Formal Approach for Reasoning About a Class of Diffie Hellman Protocols Eliminating Implicit Information Leaks by Transformational Typing and Unification Abstract Interpretation to Check Secure Information Flow in Programs with Input Output Security Annotations Opacity Generalised to Transition Systems Unifying Decidability Results on Protection Systems Using Simulations Proof Obligations Preserving Compilation A Logic for Analysing Subterfuge in Delegation Chains Probable Innocence Revisited Relative Trustworthiness Secure Untrusted Binaries — Provably! Normative Specification: A Tool for Trust and Security Type Based Distributed Access Control vs. Untyped Attackers A Security Management Information Model Derivation Framework: From Goals to Configurations On Anonymity with Identity Escrow Towards Verification of Timed Non repudiation Protocols. This book constitutes the thoroughly refereed post proceedings of the Third International Workshop on Formal Aspects in Security and Trust FAST 2005 held in Newcastle upon Tyne UK in July 2005. The 17 revised papers presented together with the extended abstract of 1 invited paper were carefully reviewed and selected from 37 submissions. The papers focus on formal aspects in security and trust policy models security protocol design and analysis formal models of trust and reputation logics for security and trust distributed trust management systems trust based reasoning digital assets protection data protection privacy and ID issues information flow analysis language based security security and trust aspects in ubiquitous computing validation analysis tools web service security trust privacy GRID security security risk assessment and case studies.