File processing unit

Details File processing unit File processing unit

2006-03-14

2006-03-14

Darrow, Justin T. (Department: 2132)

Electrical computers and digital processing systems: support

Computer program modification detection by cryptography

C713S165000, C713S176000, C713S193000

Reexamination Certificate

active

07013392

ABSTRACT:
A file processing unit comprises a first signature information producing unit that produces first signature information in accordance with a predetermined rule utilizing the data of a file designated by a file close request issued in an application used in a computer system, and a signature information storage control unit that stores the first signature information, correlated with the file designated by the file close request, in a storage unit.

REFERENCES:
patent: 5050212 (1991-09-01), Dyson
patent: 5956481 (1999-09-01), Walsh et al.
patent: 6047342 (2000-04-01), Depew
patent: 6185681 (2001-02-01), Zizzi
patent: 2002/0002681 (2002-01-01), Kawano et al.
patent: 0 816 967 (1998-01-01), None
patent: 0 837 383 (1998-04-01), None
patent: 11-39219 (1999-02-01), None

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