Patent ID: 6144744
Filing Date: 2000-11-07
Classification: H04L

Abstract:
In an information handling system in which secret information is maintained within a first protected environment, a method of transferring said secret information from said first protected environment to a second protected environment, said method being performed by one or more authorities, said information within said protected environments being unobtainable in clear form by said one or more authorities, said method comprising the steps of:establishing within said first and second protected environments a shared secret transport key that is obtainable in clear form only within said first and second protected environments and is unobtainable in clear form by said one or more authorities;encrypting said secret information within said first protected environment using said transport key to generate encrypted secret information that is obtainable in encrypted form by at least one of said one or more authorities; anddecrypting said encrypted secret information within said second protected environment using said transport key to regenerate the original secret information within said second protected environment, said regenerated secret information being unobtainable in clear form by said one or more authorities.