Apparatus and method for enhancing check security
US6600823B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1997 |
| Grant date | Jul 29, 2003 |
| Priority date | — |
| Expiry date | Oct 16, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/08
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention is a method for creating a self-authenticating value document at a senders location and for verifying it at a receivers location. At the senders location a document is created having a machine readable data field, a taggant containing extractable first tag data, and a storage medium with clear text data and the first tag data extracted from said taggant written on it. The clear text, first tag data and data from a machine readable data field collectively make up a document message. The document message is hashed with a hashing algorithm to create a first message digest. The first message digest is digitally signed with a private key to create a digital signature which is written on the storage medium in addition with the clear text data, and the first tag data.To verify the authenticity of the self-authenticating value document at the receivers location the machine readable data field is read and the storage medium containing the clear text data, first tag data, and a digital signature is also read. A document message is created from the extracted clear text data, the first tag data, and the machine readable data. The document message is then hashed with a hashing alg…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.