Protecting document from undesired alteration and undesired reproduction
US7706026B2 · kind B2 · utility
6Cited by
9References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 24, 2006 |
| Grant date | Apr 27, 2010 |
| Priority date | — |
| Expiry date | Aug 6, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus, method, system, computer program and product, each capable of protecting a document from undesired alteration and undesired reproduction are disclosed. A protected document may be generated from an original document, which is embedded with a first pattern and a second pattern. The first pattern is used for detecting undesired reproduction, while the second pattern is used for detecting undesired alteration. At the time of detection, either one of the first pattern and the second pattern may be extracted to determine whether the original document has been undesirably altered or reproduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.