Abuse-resistant object distribution system and method
US5400403A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1993 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Aug 16, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/601
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Encrypted data objects are distributed via a broadcast communication channel or media. Relatively large access indicia may also be pre-distributed to any potential data object users and/or purchasers via an access communication channel or media. Subsequently, when a particular potential user or purchaser wishes to decrypt a given data object, he or she communicates to a data distribution point the identity of the desired data object and the identity of a valid access incidium. A relatively short decryption key is then furnished via a key distribution communication channel or media to permit decryption while at the same time permitting appropriate accounting operations to take place. The system is resistant to abuse in several ways but in part because such abuse would be approximately as difficult as would be re-distribution of the entire decrypted data object itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.