Self-authenticating negotiable documents
US6170744A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1998 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Sep 24, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/08
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A self-authenticating document is created by providing a one-way hash value in a symbol creation process, and then using a public key to decrypt data of the self-authenticating document. Raw data to be provided with the self-authenticating document is received, and an account digital signature key is retrieved and used to sign the raw data. A non-repudiation hash value from a previously-created self-authenticating document is utilized, and the raw data and the digital signature key is combined with the hash value to create a new hash value for the self-authenticating document. The hashed data is then encrypted, and any non-encrypted fields are merged in to create a full data packet. The full data packet is used to provide a self-authenticating symbol, such as a bar code label, on the self-authenticating document. The self-authenticating code is used during a document verification step to ensure that the document is genuine. The non-encrypted data within the self-authenticating code contains flags indicating which public key should be used to decrypt the encrypted data within the self-authenticating code. After decryption, a checksum is performed and compared against a checksum valu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.