Key derivation system
US8843765B2 · kind B2 · utility
3Cited by
2References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 10, 2012 |
| Grant date | Sep 23, 2014 |
| Priority date | — |
| Expiry date | Nov 10, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A device generates a content key that depends upon device security state information. For example, the device may retrieve a first content key and a security state, and then derive a content key using the first content key and the security state. Accordingly, if the security state is incorrect, then the generated content key is incorrect, and the device cannot decrypt content provided to the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.