Method and system for cryptographically authenticating a printed document by a trusted party
US6907528B1 · kind B1 · utility
6Cited by
19References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2000 |
| Grant date | Jun 14, 2005 |
| Priority date | — |
| Expiry date | Feb 15, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/08
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method for authenticating a printed document is described. A document producer sends information to be included in a document to an authentication authority. The authentication authority cryptographically generates an authentication code from this information, and sends the authentication code back to the document producer. The document producer then prints the document, including both the information and the authentication code, and a bar code representing the authentication code. A document checker scans in the bar code, and cryptographically checks the authentication code against the information in the document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.