Content data storage
US7599890B2 · kind B2 · utility
5Cited by
21References
17Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 28, 2001 |
| Grant date | Oct 6, 2009 |
| Priority date | — |
| Expiry date | Sep 23, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/605
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A memory card (110) includes a memory (1415) to store encrypted content data, a license hold unit (1440) to store at least a portion of license information distributed by a distribution system, a plurality of authentication data hold units (1400.1, 1400.2), each storing a plurality of authentication data that are authenticated respectively by a plurality of public authentication keys KPma, KPmb common to the distribution system, and a switch (SW2) to selectively provide the data from the plurality of authentication data hold units outside of said recording apparatus according to a request external to the memory card (110).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.