Information processing apparatus, information recording medium, information processing method, and computer program
US7770795B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2006 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | May 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information processing apparatus for recording information on an information recording medium is provided. The information processing apparatus includes a content cryptographic processor configured to generate encrypted content by executing encryption using a unit key associated with a content management unit that serves as a unit for controlling usage of content; a unit-key-file processor configured to generate a unit key file storing the unit key, and to encrypt the unit key file or constituent data of the unit key file using an encryption key that is generated using a seed whose value is updated in accordance with change in constituent data of unit keys included in the unit key file; and a data recorder configured to record the content management unit including the encrypted content as constituent data and the unit key file on the information recording medium according to a predetermined data recording format.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.