Permuting records in a database for leak detection and tracing
US8412755B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2009 |
| Grant date | Apr 2, 2013 |
| Priority date | — |
| Expiry date | Jul 6, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/16
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method comprises receiving, by a processor, a copy of a database containing records, each record having a plurality of attributes. The method also comprises determining, by the processor, whether a first attribute in each record results in a predetermined value in modulo P when hashed with a key and determining, by the processor, whether a second attribute in each record results in the predetermined value in modulo P when hashed with a key. For a first record whose first attribute results in the predetermined value in modulo P when hashed with a key and a second record whose second attribute also results in the predetermined value in modulo P when hashed with a key, the method further comprises swapping by the processor the second attributes between the first and second records.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.