Backup/restore technique in a microcomputer-based encryption sys

Details Backup/restore technique in a microcomputer-based encryption sys Backup/restore technique in a microcomputer-based encryption sys

1988-12-09

1991-04-16

Congialosi, Salvatore

Cryptography

Electric signal modification

Having production of printed copy

380 21, 380 25, H04L 908

Patent

active

050089366

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.

REFERENCES:
patent: 3956615 (1976-05-01), Anderson et al.
patent: 4186871 (1980-02-01), Anderson et al.
patent: 4218738 (1980-08-01), Matyas et al.
patent: 4288659 (1981-09-01), Atalla
patent: 4405535 (1984-05-01), de Pommary et al.
patent: 4423287 (1984-12-01), Zeidler
patent: 4578530 (1986-03-01), Zeidler
patent: 4802218 (1989-01-01), Wright et al.

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