System and method for controlling access to a user secret using a key recovery field
US6272632A · kind A · utility
170Cited by
50References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1998 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Feb 12, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2103
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method for data recovery is described. In one embodiment, an encrypting system encrypts a message or file using a secret key (KS) and attaches a key recovery field (KRF), including an access rule index (ARI) and KS, to the encrypted message or file. To access the encrypted message or file, a decrypting system must satisfactorily respond to a challenge issued by a key recovery center. The challenge is based on one or more access rules that are identified by the ARI included within the KRF.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.