Apparatus, methods and computer programs for controlling performance of operations within a data processing system or network
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United States of America Patent
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Jul 8, 2008
Grant Date -
Jun 16, 2005
app pub date -
Dec 12, 2003
filing date -
Dec 12, 2003
priority date (Note) -
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status (Latency Note)
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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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