Data security protection for information recorded on a rewritabl

Details Data security protection for information recorded on a rewritabl Data security protection for information recorded on a rewritabl

1994-10-03

1996-07-09

Epps, Georgia Y.

Dynamic information storage or retrieval

Duplication or copying

369 13, 369 54, 3692752, 380 3, 380 4, 380 25, G11B 728, H04L 900

Patent

active

055351883

ABSTRACT:
A data storage system provides the data security afforded by write-once, read-many storage media and the lower cost afforded by rewritable storage media. To effectively write protect data, the system generates a protective code based upon the data to be stored, stores the protective code and a data identification on WORM media and stores the data and the location of the protective code on rewritable media. When the data is later read, it is verified by reading the data, generating a new protective code from the data and comparing the new code with the original code. Any difference between the two protective codes indicates that the data has been altered.

REFERENCES:
patent: 4960982 (1990-10-01), Takahira
patent: 5249231 (1993-09-01), Covey et al.
patent: 5282247 (1994-01-01), McLean et al.
patent: 5311595 (1994-05-01), Bjerrum et al.
patent: 5341429 (1994-08-01), Stringer et al.
Computer Technology Review, "Super Hash Serves Up Super Privacy On The Internet", by Dave Trowbridge, vol. XV, No. 4, Apr. 1995, pp. 29, 38 and 42.

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