Privacy Enhancing Technologies [electronic resource] : 4th International Workshop, PET 2004, Toronto, Canada, May 26-28, 2004, Revised Selected Papers /

Anonymity and Covert Channels in Simple Timed Mix-Firewalls -- Practical Traffic Analysis: Extending and Resisting Statistical Disclosure -- The Traffic Analysis of Continuous-Time Mixes -- Reputable Mix Networks -- Secure Outsourcing of Sequence Comparisons -- An Improved Construction for Universal Re-encryption -- Electromagnetic Eavesdropping Risks of Flat-Panel Displays -- On the Anonymity of Banknotes -- FLASCHE – A Mechanism Providing Anonymity for Mobile Users -- Cryptographically Protected Prefixes for Location Privacy in IPv6 -- Protecting User Data in Ubiquitous Computing: Towards Trustworthy Environments -- Synchronous Batching: From Cascades to Free Routes -- On Flow Correlation Attacks and Countermeasures in Mix Networks -- Measuring Anonymity in a Non-adaptive, Real-Time System -- Panel Discussion — Mix Cascades Versus Peer-to-Peer: Is One Concept Superior? -- On the PET Workshop Panel “Mix Cascades Versus Peer-to-Peer: Is One Concept Superior?” -- A Formal Privacy System and Its Application to Location Based Services -- Privacy-Preserving Trust Negotiations -- Language-Based Enforcement of Privacy Policies -- Searching for Privacy: Design and Implementation of a P3P-Enabled Search Engine -- Contextualized Communication of Privacy Practices and Personalization Benefits: Impacts on Users’ Data Sharing and Purchase Behavior -- Panel Discussion — Conforming Technology to Policy: The Problems of Electronic Health Records.