System and method for authentication of transformed documents
US8219817B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2006 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Mar 2, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A document verification system and method verifies that a content of two documents match based on comparison of an authentication signature generated from each of the documents. The documents may be electronic text documents and may be transformed representations of each other through imaging, printing or image processing. Authentication signatures can be encrypted to enhance security and identify document sources. An authentication signature can be generated for an entirety or portions of the document. Multiple authentication signatures may be generated for each document for selected document regions. The authentication signature can be stored electronically or in hard copy and can be machine-readable to be automatically interpreted by a machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.