EXTENDING AN INTEGRITY MEASUREMENT

摘要

A method of extending an integrity measurement in a trusted device operating in an embedded trusted platform by using a set of policy commands to extend a list of Platform Configuration Registers (PCRs) for the device and the current values of the listed PCRs and an integrity value identifying the integrity measurement into a policy register, verify a signature over the integrity value extended into the policy register, and, if verification succeeds, extend a verification key of the trusted platform, plus an indication that it is a verification key, into the policy register, compare the integrity value extended into the policy register with a value stored in the trusted platform, and, if they are the same: extend the stored value, plus an indication that it is a stored value, into the policy register, and extend the integrity measurement in the trasted device if the value in the policy register matches a value stored with the integrity measurement.