Method of and system for encrypting digital data, method of and apparatus for reproducing digital data, and computer product
US7330980B2 · kind B2 · utility
3Cited by
7References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 30, 2002 |
| Grant date | Feb 12, 2008 |
| Priority date | — |
| Expiry date | Jun 30, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91364
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is provided an input unit which reads copyright digital data stored in a recording medium such as a CD-ROM, an operation unit which performs encryption of digital data based on an encryption algorithm from a plurality of encryption algorithms. A file unit outputs the digital data encrypted by the operation unit and an index value and the encryption operation equation generation parameter into one file. A reproducing apparatus obtains an encryption operation equation from the index value and the encryption operation equation generation parameter in this same file and reproduces the encrypted digital data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.