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yberspace is invading private space. Controversies about spam, cookies, and the clickstream are merely the tip of an iceberg. Behind them loom real-time person-location technologies including intelligent transportation systems, geo-location, biometric identification, hard authentication techniques, and miniaturized processors embedded in plastic cards, anklets, watches, rings, products, product packaging, livestock, pets, and people.
Roger Clarke (Mon,) studied this question.