Media authentication using altered sector sizes
US7102973B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 2003 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Mar 4, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/00615
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for authenticating a data storage medium (such as an optical disc including a compact disc, CD or a digital versatile disc, DVD) in which data are nominally stored in a plurality of sectors have a defined sector size containing a first total number of bits. A number of altered sectors are formed on the medium each having a second total number of bits different from the first total number of bits. The altered sectors will provide readback data at a different rate than a nominal rate determined by the defined sector size. The altered sectors are used to verify the medium as being an authorized copy and prevent unauthorized copying efforts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.