DEVICE, PROGRAM AND METHOD FOR MEASURING PLATFORM CONFIGURATION, DEVICE, PROGRAM AND METHOD FOR AUTHENTICATING PLATFORM CONFIGURATION, DEVICE, PROGRAM AND METHOD FOR VERIFYING PLATFORM CONFIGURATION, AND DEVICE, PROGRAM AND METHOD FOR DISCLOSING PLATFORM CONFIGURATION

摘要

PROBLEM TO BE SOLVED: To provide techniques that allow indicating that a platform is reliable, without providing an attacker with information for attacks.;SOLUTION: A device for measuring the configuration of a platform includes a configuration register; a means for performing a predetermined operation on the content of the configuration register using given additional values, then applying predetermined hash functions to values obtained from the operation to obtain hash values, and using the hash values as the new content of the configuration register; and measurement expansion means (step S1-S4) for making predetermined measurements on predetermined component elements that constitute the platform to obtain measurements that correspond to the component elements, and for implementing an expansion process using an expansion process means while using the measurements as additional values. The device is provided with a random expansion means (step S5) for implementing an expansion process using the expansion process means while using random values as additional values.;COPYRIGHT: (C)2006,JPO&NCIPI