Sheet processing apparatus, method of preventing...

Details Sheet processing apparatus, method of preventing... Sheet processing apparatus, method of preventing...

2005-09-12

2009-12-15

Hoffman, Brandon S (Department: 2436)

Electrical computers and digital processing systems: support

Computer program modification detection by cryptography

Reexamination Certificate

active

07634663

ABSTRACT:
In this invention, CPUs previously calculate hash function values based on programs during the startup time (initialization time) at the power-ON time of equipment and a management device. Therefore, when a hash function value is re-calculated, the hash function value is re-calculated based on the date and hour and 160-bit hash function value. As a result, in a sheet inspecting apparatus, the (total) number of cut-apart sheets can be prevented from being falsified by preventing falsification of the programs.

REFERENCES:
patent: 5310036 (1994-05-01), Hell
patent: 2004/0199508 (2004-10-01), Radatti
patent: 2005/0005150 (2005-01-01), Ballard
patent: 2000-339153 (2000-12-01), None
patent: 2005-267022 (2005-09-01), None
European Search Report dated Sep. 4, 2007 for Appln. No. 05019584.1-1229.

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