Method and apparatus for authenticating content in a portable device
US6802004B1 · kind B1 · utility
16Cited by
4References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2000 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Aug 5, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2135
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A portable device receives content from a computer and a signature certificate. The signature certificate is derived from content after the content successfully passes a watermark screening process. The portable device compares the received signature certificate to the received content. The content is only played in the portable device when the received signature certificate authenticates the received content as passing the watermark screening process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.