Verifying digital signature based on shared knowledge
US7936869B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 8, 2005 |
| Grant date | May 3, 2011 |
| Priority date | — |
| Expiry date | Jan 21, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of verifying a digital signature of a first party that was generated using an elliptic curve digital signature algorithm (ECDSA) includes the steps of receiving a public key from the first party; receiving a digital signature from the first party, the digital signature being for an electronic message; identifying domain parameters of an elliptic curve used in elliptic curve cryptography, including identifying a generating point of the elliptic curve; transforming the identified generating point into a second generating point as a deterministic function of shared knowledge known to and between the first party and a second party; and verifying the received digital signature as a deterministic function of the received public key, the electronic message, and the identified domain parameters, in which the second generating point is substituted for the identified generating point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.