Method and apparatus for incremental delivery of access rights
US5485577A · kind A · utility
183Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1994 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Dec 16, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/603
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Incremental delivery of authenticated access rights to an access control processor is provided. Subgroups of the access rights are communicated to the processor in a plurality of messages. The subgroups are stored in different data banks within the processor, and validity designations associated with the data banks indicate whether the data currently stored therein has been authenticated under a cryptographic key currently in use. Access under a particular key is limited to that provided by access rights contained in storage banks having a validity designation in a valid state for that key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.