Data terminal device providing backup of uniquely existable content data
US7134026B2 · kind B2 · utility
20Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 2002 |
| Grant date | Nov 7, 2006 |
| Priority date | — |
| Expiry date | Oct 4, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/101
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a cellular phone, a controller stores content data received from a distribution server into a memory. When the content data is to be transmitted to a memory card, a random number key generator generates a license key, and an encryption processing unit encrypts the content data using the license key. The controller transmits encrypted content data to a memory card via a memory card interface. Then, the controller deletes the content data stored in the memory. As a result, distribution of content data that must be deleted when transferring to another apparatus can be facilitated while protecting the copyright.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.