Methods, apparatus and computer programs for generating and/or using conditional electronic signatures for reporting status changes
US8862886B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2003 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Sep 3, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Provided are methods, apparatus and computer programs for generating and using conditional electronic signatures enabling the parties to an online communication or transaction to link conditions unambiguously with signed data items, and enabling verification of the authenticity of the data item and conditions and verification of the identity of the signing party. A data item and one or more conditions are separately hashed, the resulting digests (hash values) are concatenated, and the concatenand is further hashed to produce a final digest. The final digest is encrypted using the private key of a public/private key encryption scheme to produce a conditional digital signature. The data item and conditions can each be verified. Verification includes decrypting the conditional signature and comparing the decrypted result with a separately generated final digest. A solution is also disclosed for propagating information to interested parties when a first is countermanded at a second review.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.