Method of authenication for steganographic signals undergoing degradations
US7130444B2 · kind B2 · utility
14Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2002 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Jul 9, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3235
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for authenticating a printed or scanned embedded image is disclosed that utilizes a prediction of the effect of a print or scanning process on the embedded message based upon characteristics of the printer or scanner. These values are measured directly at the time of authentication and compared to the predicted. Based on the comparison a decision is made regarding authenticity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.