Producing representative hashes for segments of a file
US7797323B1 · kind B1 · utility
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20Claims
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Key dates
| Filing date | Oct 11, 2006 |
| Grant date | Sep 14, 2010 |
| Priority date | — |
| Expiry date | Aug 2, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/1748
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A file is divided into plural segments, and for each of at least some of the plural segments, plural windows covering different portions of the corresponding segment are defined. According to a predefined criterion, one of the windows associated with the corresponding segment is selected. A representative hash based on the portion in the selected window is calculated for representing the corresponding segment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.