Backup/restore technique in a microcomputer-based encryption system
US5008936A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1988 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Dec 9, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0897
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An improved method and system for backing-up secure files in a data encryption unit is described. In accordance with the teachings of this invention, encrypted files are read from the memory of a first encryption device and stored in a temporary location. The encrypted files are then re-encrypted under a predefined encryption key and stored in a removable non-volatile memory device. To restore a file, the re-encrypted files are read from the non-volatile memory device, decrypted under the predefined key and stored in the temporary memory location. The recovered files are then loaded into memory of the first device from the temporary memory location. The present invention further includes means for destroying the contents of the non-volatile storage device upon the detection of tampering therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.