System and method for access control for portable data storage media
US5457746A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1994 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Dec 19, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2135
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The system and method of the present invention provides the support of high density removable media, such as CD-ROM or MO, to be used as a distributed media for storing data where access thereto is securely restricted. Through this system and method, the secure periodic distribution of several different sets of data information to the end user is achieved with access control selectively performed by at the user's site through communication with the billing/access center. User billing is based on the purchase of the decryption access codes as indicated by the access code attributes encoded on the media. Access code availability is further controlled by selectively providing for updates of decryption access codes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.