Constitutes the thoroughly refereed postproceedings of the 5th International Workshop on Privacy Enhancing Technologies, PET 2006, held in Cavtat, Croatia, in May and June 2005. This title addresses privacy enhancing technologies in various application contexts.

Privacy Vulnerabilities in Encrypted HTTP Streams.- An Analysis of Parallel Mixing with Attacker-Controlled Inputs.- Message Splitting Against the Partial Adversary.- Location Privacy for Cellular Systems; Analysis and Solution.- Towards Modeling Wireless Location Privacy.- Failures in a Hybrid Content Blocking System.- Anonymity Preserving Techniques in Trust Negotiations.- Unmixing Mix Traffic.- Mix-Network with Stronger Security.- Covert Channels in IPv6.- Towards Privacy-Aware eLearning.- Anonymization of IP Traffic Monitoring Data: Attacks on Two Prefix-Preserving Anonymization Schemes and Some Proposed Remedies.- Privacy Issues in Vehicular Ad Hoc Networks.- High-Power Proxies for Enhancing RFID Privacy and Utility.- Integrating Utility into Face De-identification.- Privacy in India: Attitudes and Awareness.- Economics of Identity Management: A Supply-Side Perspective.