Key-based protection method for light-readable discs
US6161179A · kind A · utility
80Cited by
9References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1998 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Mar 4, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/0071
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To protect access to information recorded on a light-readable disc, a light-readable disc player provides the user with a unique key each time the user attempts to play the disc. After the user communicates the unique key to a transaction service and satisfies certain preconditions, such as providing payment or account information, the transaction service provides the user with an unlock key. The user communicates the unlock key to the light-readable disc player, which plays the disc only if the user has provided the correct unlock key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.