Transmitter device, transmitting method, receiver device, receiving method, communication system, and program storage medium
US7522726B2 · kind B2 · utility
17Cited by
54References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2005 |
| Grant date | Apr 21, 2009 |
| Priority date | — |
| Expiry date | Dec 22, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A memory stores a hash value of content management data. When an IEEE1394 interface authenticates a personal computer connected thereto via a network, the IEEE1394 transmits content management data to the personal computer while receiving a hash data of the content management data from the personal computer. The IEEE1394 interface then determines whether the received hash value of the content management data matches the stored hash value of the content management data. This arrangement prevents the unauthorized copying of content data, and limits the number of uses of the content data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.