Services that provide anonymous and unobservable access to the Internet are important for electronic commerce applications as well as for services where users want to remain anonymous.
This book is devoted to the design and realization of anonymity services for the Internet and other communcation networks.

Terminology.- Anonymity, Unobservability, and Pseudonymity — A Proposal for Terminology.- Attacks on Systems.- Traffic Analysis: Protocols, Attacks, Design Issues, and Open Problems.- The Disadvantages of Free MIX Routes and How to Overcome Them.- Anonymous Publishing.- Freenet: A Distributed Anonymous Information Storage and Retrieval System.- The Free Haven Project: Distributed Anonymous Storage Service.- Mix Systems.- Towards an Analysis of Onion Routing Security.- Web MIXes: A System for Anonymous and Unobservable Internet Access.- Identity Management.- Privacy Incorporated Software Agent (PISA): Proposal for Building a Privacy Guardian for the Electronic Age.- Identity Management Based on P3P.- Pseudonyms and Remailers.- On Pseudonymization of Audit Data for Intrusion Detection.- Protection Profiles for Remailer Mixes.

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