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This book constitutes the thoroughly refereed post-proceedings of the Third International Workshop on Privacy Enhancing Technologies, PET 2002, held in Dresden, Germany in March 2003.§The 14 revised full papers presented were carefully selected from 52 submissions during two rounds of reviewing and improvement. Among the topics addressed are mix-networks, generalized mixes, unlinkability, traffic analysis prevention, face recognition, privacy legislation, Web censorship, anonymous networking, personalized Web-based systems, and privacy in enterprises.