Encryption system for mixed-trust environments
US5949883A · kind A · utility
8Cited by
15References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1995 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Sep 28, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0625
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Encryption frequently needs to be used in communication networks which span different geographical regions which can be considered to be trusted to different extents. According to one embodiment, the invention uses both a strong encryption algorithm and a weak encryption algorithm. A device in the high-trusted region can encrypt using the strong algorithm and can decrypt using either the strong or weak algorithm. A device in the low-trusted region can decrypt with either the strong or the weak algorithm but can encrypt only with the weak algorithm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.