6th Workshop on Privacy Enhancing Technologies -- Privacy for Public Transportation -- Ignoring the Great Firewall of China -- Imagined Communities: Awareness, Information Sharing, and Privacy on the Facebook -- Enhancing Consumer Privacy in the Liberty Alliance Identity Federation and Web Services Frameworks -- Traceable and Automatic Compliance of Privacy Policies in Federated Digital Identity Management -- Privacy Injector — Automated Privacy Enforcement Through Aspects -- A Systemic Approach to Automate Privacy Policy Enforcement in Enterprises -- One Big File Is Not Enough: A Critical Evaluation of the Dominant Free-Space Sanitization Technique -- Protecting Privacy with the MPEG-21 IPMP Framework -- Personal Rights Management – Taming Camera-Phones for Individual Privacy Enforcement -- Improving Sender Anonymity in a Structured Overlay with Imprecise Routing -- Selectively Traceable Anonymity -- Valet Services: Improving Hidden Servers with a Personal Touch -- Blending Different Latency Traffic with Alpha-mixing -- Private Resource Pairing -- Honest-Verifier Private Disjointness Testing Without Random Oracles -- A Flexible Framework for Secret Handshakes -- On the Security of the Tor Authentication Protocol -- Optimal Key-Trees for Tree-Based Private Authentication -- Simple and Flexible Revocation Checking with Privacy -- Breaking the Collusion Detection Mechanism of MorphMix -- Linking Anonymous Transactions: The Consistent View Attack -- Preserving User Location Privacy in Mobile Data Management Infrastructures -- The Effects of Location Access Behavior on Re-identification Risk in a Distributed Environment.