Key variable identification method
US5247576A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1991 |
| Grant date | Sep 21, 1993 |
| Priority date | — |
| Expiry date | Feb 27, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/80
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a communication system that includes a plurality of communication units, a communication resource allocator, and a limited number of transceivers that transceive information amongst the plurality of communication units via a limited number of communication resources, at least some of the information is transceived utilizing encryption means. To enhance the security of the communication system multiple keys are employed wherein a first communication unit transmits information identifying a particular key of the plurality of keys. Upon receiving the identifying information, at least a second communication unit looks up the particular key that is represented by the identifying information. Once the key is determined, it is loaded into a cryptographic circuit of the second communication unit enabling the second communication unit to receive encrypted messages from the first communication unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.