Securely upgrading or downgrading platform components

摘要

A method for securely altering a platform component is provided, comprising: assigning certificates for public encryption and signature verification keys for the device; assigning certificates for public encryption and signature verification keys for an upgrade server; mutually authenticating a device containing the platform component and the upgrade server; causing the device and the upgrade server to exchange a session key; and providing an alteration to be made to the platform component from the upgrade server to the device using the session key.