Method and apparatus for verifying the integrity of a file store

Details Method and apparatus for verifying the integrity of a file store Method and apparatus for verifying the integrity of a file store

1990-06-20

1991-09-17

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 4, 380 49, 34082531, 34082534, G06F 702, H04L 932

Patent

active

050502123

ABSTRACT:
A method and apparatus for verifying a file stored separately from a computer to be identical with a previous version of the file, before using the file. This verification is done by following a defined procedure to generate a first identifier based on the contents of the previous version of the file, storing this identifier locally on the computer, and storing the file at a separate storage location. Then, at a later time, an unverified second file is retrieved from the separate storage location, the same defined procedure is followed to generate a second identifier, and the first and second identifiers compared to identify a match that verifies the integrity of the second file.

REFERENCES:
patent: 4933969 (1990-06-01), Marshall et al.
Datamation, p. 160, Schwartz, (1983), "Other Uses for the MAC".

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