Automatic generation of embedded signatures for duplicate detection on a public network
US7979413B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 30, 2008 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Aug 28, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/3334
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In accordance with an aspect of the invention, a method and system are disclosed for constructing an embedded signature in order to facilitate post-facto detection of leakage of sensitive data. The leakage detection mechanism involves: 1) identifying at least one set of words in an electronic document containing sensitive data, the set of words having a low frequency of occurrence in a first collection of electronic documents; and, 2) transmitting a query to search a second collection of electronic documents for any electronic document that contains the set of words having a low frequency of occurrence. This leakage detection mechanism has at least the following advantages: a) it is tamper-resistant; b) it avoids the need to add a watermark to the sensitive data, c) it can be used to locate the sensitive data even if the leakage occurred before the embedded signature was ever identified; and, d) it can be used to detect an embedded signature regardless of whether the data is being presented statically or dynamically.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.