Method and apparatus for protecting information and privacy

Details Method and apparatus for protecting information and privacy Method and apparatus for protecting information and privacy

2008-07-29

2008-07-29

Revak, Christopher (Department: 2131)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

C713S155000, C713S190000, C705S057000, C380S201000, C709S217000, C726S031000, C726S032000, C726S033000

Reexamination Certificate

active

07406593

ABSTRACT:
A system for protecting software against piracy while protecting a user's privacy enables enhancements to the protection software in a user device and extended protections against piracy. The protection system allows the user device to postpone validation of purchased tags stored in a tag table for installed software and to re-establish ownership of a tag table to recover from invalidation of a tag table identifier value resulting from revelation of a tag table identifier value. Continued use of the tag table is provided by the use of credits associated with a tag table. A protection center is protected against denial of service attacks by making calls to the protection center cost time or money to the attackers.

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