Production protection system dealing with contents that are digital production
US6687683B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1999 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Oct 8, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2107
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data protection system obtains data having a first content on which a first encryption has been performed and a second content on which a second encryption has been performed, the second encryption more difficult to break than the first encryption. A first content decryption unit decrypts the first content, using a first encryption method corresponding to the first encryption of the first content. A second content decryption unit decrypts the second content using a second decryption method that corresponds to the second encryption. The decrypting contents can be executed by a software, and the second content decryption unit can include one of tamperproof hardware and an apparatus that executes tamperproof software.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.