Encryption apparatus for computer device
US5325430A · kind A · utility
81Cited by
10References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1991 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Oct 17, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/86
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computing device has storage means, for example fixed and floppy discs, a processor and I/O devices. A communication bus connects this device to a security module which includes data encryption circuitry. The security module preferably also includes its own microprocessor, security storage and a token coupler for copying to a token, for example an IC card. Data stored on the storage means is encrypted in accordance with keys read from tokens in the token coupler. Different levels of encryption and access can be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.