Data recording apparatus, data recording method, and data transfer system
US7228568B2 · kind B2 · utility
17Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2002 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Aug 29, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention is intended to significantly reduce the content data processing and transfer times by skipping root key checking processing, when transmitting a plurality of pieces of encrypted content data stored in a primary recording medium to a secondary recording medium along with key information of these plural pieces of content data, if the key information for a piece of content data to be transmitted from the primary recording medium is the same as the key information for an already transmitted piece of content data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.