Information processing system which can check disk-like storage medium having prescribed relation therewith and disk-like storage medium therefor
US5778421A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1996 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | May 3, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2121
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
This is invention provides an information processing system for a disk-like storage medium such as flexible magnetic disks or a DVD-RAMs. The disk-like storage medium stores a first data including at least image data, and a second data for deciding legitimacy of the image data, while a case containing the disk-like storage medium comprises a non-volatile storage device for storing a third data having a predetermined relationship with the second data and storing a fourth data for identifying a location in the disk-like storage medium at which the second data is stored. Whne a predetermined relationship between the second and third data is confirmed, the disk-like storage medium is allowed to be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.