Abstract

A system and method for data recovery is described. In one embodiment, an encrypting system encrypts a message or? le using a secret key (KS) and attaches a key recovery? eld (KRF), including an access rule index (ARI) and KS, to the encrypted message or? le. To access the encrypted message or? le, 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 identi? ed by the ARI included within the KRF.

Date

August 7, 2001

Authors

DW Carman, DM Balenson, H Tajalli, ST Walker

Inventors

David W Carman, David M Balenson, Homayoon Tajalli, Stephen T Walker

Patent_office

US

Patent_number

6272632

Application_number

09022677