Publicly verifiable key recovery
US6249585A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1997 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Apr 8, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0841
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention is a system and method for publicly verifying that a session key determined according to a Diffie-Hellman key exchange can be recovered from information associated with a communication encrypted with the session key. More particularly, the present invention provides recovery information and verification information with the encrypted communication. A recovery agent is able to recover the session key using the recovery information. A verifier, using the verification information, is able to verify that the session key can, in fact, be recovered from the recovery information. Neither the recovery information nor the verification information alone reveal any secret or private information. Furthermore, only the recovery agent is able to recover the session key, and he does so without revealing any other private information. Thus, the verification can be performed by any member of the public.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.