Recording/reproduction device, data processing device, and recording/reproduction system
US7500101B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 4, 2003 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Jun 17, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/00362
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device key 46 is implemented on a drive 4 side. To securely transmit the device key 46 to a host 5, the device key 46 is encrypted with a bus key. The host 5 side decrypts the device key with the bus key. A medium unique key calculating block 55 calculates a medium unique key with an MKB 12, a medium ID, and the decrypted device key 46. When the calculated medium key is a predetermined value, the drive 4 is revoked and the process is stopped. The medium unique key is supplied to an encrypting/decrypting module 54. A content key is obtained with an encrypted title key 14 and a CCI 15. With the content key, an encrypted content is decrypted and a content that is recorded is encrypted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.