Observance of laws on the protection of minors is a serious problem at places with Internet access. We examine protection mechanisms in view of the Internet's open and dynamic nature and claim that those based on deterrence and restoration should be preferred to purely preventive ones. We then present a strategy adequate for secondary schools. The technical part relies on adaptable filter and logging components, which check and log requested web-pages. In a feed-back loop a human auditor provides more information to the system, thus increasing the effectiveness. On the other hand, separation of powers among auditors ensures the users' privacy.
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