INITIALIZING, MAINTAINING, UPDATING AND RECOVERING SECURE OPERATION WITHIN AN INTEGRATED SYSTEM EMPLOYING A DATA ACCESS CONTROL FUNCTION

摘要

Techniques are provided for initializing, maintaining, updating and recoveringsecure operation within an integrated system. The techniques, which employ adata accesscontrol function within the integrated system, include authenticating by acurrent level ofsoftware a next level of software within an integrated system. Theauthenticating occursbefore control is passed to the next level of software. Further, an ability ofthe next level ofsoftware to modify an operational characteristic of the integrated system canbe selectivelylimited via the data access control function. Techniques are also provided forinitializingsecure operation of the integrated system, for migrating data encrypted usinga first key setto data encrypted using a second key set, for updating software and keyswithin theintegrated system, and for recovering integrated system functionalityfollowing a triggerevent.