Hard disk data security device

Details Hard disk data security device Hard disk data security device

1992-08-05

1994-08-30

Gregory, Bernarr E.

Cryptography

Cryptanalysis

380 9, 380 23, 380 25, 380 49, 380 50, 34082531, 34082534, H04L 900

Patent

active

053435257

ABSTRACT:
A hard disk data security device comprises a control circuit which once detecting an I/O address of data register for hard disk present on the address bus enables a data enciphering/deciphering circuit which receives the data to be stored on the hard disk from the computer inside which the hard disk is installed and converts the data from a regular form into an encrypted form or receives the encrypted data from the hard disk and decrypts and outputs the data to the computer. A plurality of switches may be provided for a user to select an arbitrary encrypting pattern of the data byte.

REFERENCES:
patent: 4757534 (1988-07-01), Matyas et al.
patent: 4797928 (1989-01-01), Dykes

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