Generating digital signatures using ephemeral cryptographic key
US7693277B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 8, 2005 |
| Grant date | Apr 6, 2010 |
| Priority date | — |
| Expiry date | Jan 9, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3252
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Generating a digital signature utilizing a cryptograph key includes: receiving into a computer system input data from a user (UID); generating within the computer system a cryptographic key as a deterministic function of the UID; clearing from the computer system the UID; generating within the computer system a digital signature as a function of the generated cryptographic key; and clearing the generated cryptographic key from the computer system following generation of the digital signature. The digital signature further may be generated as a function of whether a digital signature has yet been generated using the generated cryptographic key following receipt of the UID. Neither the received UID nor the generated cryptographic key is exported from the computer system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.