Method and apparatus for preventing unauthorized use by comparing medium identifications
US5930825A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1995 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Mar 17, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording medium has a medium ID information storing area in a user data area for identification of the recording medium on which software/data is recorded. An original medium ID information storing area, which is regarded as a defect area, is also included in the user data area for storing original medium ID information, wherein the original medium ID information is compared with the medium ID information to judge unauthorized use of the software/data. Further, an alternate area adjacent the user data area is provided for storing data which do not agree with the medium ID information. A method of preventing unauthorized use in a system for reading software/data from a recording medium includes reading medium ID information of the recording medium from which the software is read. Then data from a ROM or a RAM area on the recording medium indicated by a predetermined address is read. The medium ID information and the data are compared, and unauthorized use of the software/data is judged based on the result of the comparison between the medium ID information and the data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.