File access security method and means
US4588991A · kind A · utility
340Cited by
2References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1983 |
| Grant date | May 13, 1986 |
| Priority date | — |
| Expiry date | Mar 7, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2107
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An improved file access security technique and associated apparatus accesses data which is stored in encrypted form under one encryption key and re-stores the data re-encrypted under another encryption key, and produces a record of each access and data re-encryption both as the control source of encryption keys for access and re-entry of encrypted data and as a secured audit record of users that had access to each file.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.