Method and apparatus for contents information
US6889323B2 · kind B2 · utility
2Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2000 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | May 16, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A signal representative of a key is generated from authenticator-value information and key base information. The authenticator-value information represents a specified authenticator value. The key base information contains identification information which is set to reproduce the specified authenticator value according to a predetermined degeneration function. Contents information is encrypted into encryption-resultant contents information in response to the key signal. The key base information and the encryption-resultant contents information are transmitted or recorded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.