Apparatus, methods and computer programs for controlling...

Details Apparatus, methods and computer programs for controlling... Apparatus, methods and computer programs for controlling...

2008-07-08

2008-07-08

Barron, Jr., Gilberto (Department: 2139)

Electrical computers and digital processing systems: support

Computer program modification detection by cryptography

C713S188000, C726S024000

Reexamination Certificate

active

07398399

ABSTRACT:
Provided are methods, apparatus and computer programs for identifying matching resources (data files and executable files) within a data processing network, by comparison of hash values computed for each of a set of resources. A match between a newly computed hash value and a previously computed hash value for a resource indicates that the resource has not changed since the previous computation. A match between hash values for different resources indicates that they are identical. The result of the comparison can be used to determine whether a virus scan is currently required for a resource, on the basis that a resource which is unchanged since it was classified virus-free remains virus-free and a resource which is identical to a virus-scanned resource does not require duplication of the virus scan. The methods, apparatus and computer programs enable more efficient use of antivirus scanning or management of a backup copy process.

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