Multilateral Security -- Multilateral Security: Enabling Technologies and Their Evaluation -- Do You Trust Your Recommendations? An Exploration of Security and Privacy Issues in Recommender Systems -- Security in Service-Oriented Computing -- Optimized Workflow Authorization in Service Oriented Architectures -- Dynamic Layer-2 VPN Services for Improving Security in the Grid Environment -- A P2P Content Authentication Protocol Based on Byzantine Agreement -- Secure Mobile Applications -- Transitive Trust in Mobile Scenarios -- An Open, PKI-Based Mobile Payment System -- Secure Rejoining Scheme for Dynamic Sensor Networks -- Developing Provable Secure M-Commerce Applications -- Enterprise Privacy -- An Algebra for Enterprise Privacy Policies Closed Under Composition and Conjunction -- Privacy-Preserving Decision Tree Mining Based on Random Substitutions -- Privacy, Identity, and Anonymity -- Policy-Based Integration of User and Provider-Sided Identity Management -- Privacy with Delegation of Rights by Identity Management -- A Framework for Quantification of Linkability Within a Privacy-Enhancing Identity Management System -- Revocable Anonymity -- Low Latency Anonymous Communication - How Long Are Users Willing to Wait? -- Security Engineering -- Security Engineering Using Problem Frames -- SecTOOL - Supporting Requirements Engineering for Access Control -- Possibilistic Information Flow Control in MAKS and Action Refinement -- Toward a Framework for Forensic Analysis of Scanning Worms -- A Comparison of Market Approaches to Software Vulnerability Disclosure -- Reliable Keystroke Biometric System Based on a Small Number of Keystroke Samples -- Security Policies -- Allowing State Changes in Specifications -- Field Access Analysis for Enforcing Access Control Policies -- Controlling Access toDocuments: A Formal Access Control Model -- How to Increase the Security of Digital Rights Management Systems Without Affecting Consumer's Security -- Security and Protocols -- Secure End-to-End Transport over SCTP -- An Extended Model of Rational Exchange Based on Dynamic Games of Imperfect Information -- Filtering for Private Collaborative Benchmarking -- Intrusion Detection -- On the Use of Word Networks to Mimicry Attack Detection -- Simplifying Signature Engineering by Reuse -- Redesign and Implementation of Evaluation Dataset for Intrusion Detection System -- Requirements of Information Reductions for Cooperating Intrusion Detection Agents -- Perspectives of Cryptographic Security -- Quantum Algorithm for Solving the Discrete Logarithm Problem in the Class Group of an Imaginary Quadratic Field and Security Comparison of Current Cryptosystems at the Beginning of Quantum Computer Age -- Kleptographic Attacks on E-Voting Schemes -- Visual Document Authentication Using Human-Recognizable Watermarks.