Method and apparatus for protecting information and privacy
US7406593B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2003 |
| Grant date | Jul 29, 2008 |
| Priority date | — |
| Expiry date | Feb 21, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/1077
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.