Patent ID: 7930563

Claim:
A platform configuration measurement device which comprises: a platform configuration register (PCR) specified in a Trusted Computing Group specification, said PCR register configured for storing content relating to configuration information; at least one processor configured to: perform execution extension processing in which a predetermined operation of concatenation of an additional value to a content of the PRC register is performed on a content of the register by using a given additional value, a hash value is obtained by applying a predetermined hash function to a value obtained by the predetermined operation, and the hash value is set for anew content of the register; obtain measured values, corresponding to predetermined components constituting a platform, by sequentially making predetermined measurement on the predetermined components, and for allowing the means for executing extension processing to execute the extension processing using the measured values as the additional values; and executing extension processing using a random value as the additional value repeatedly at a predetermined time; store a history of each extension processing in a log; and memory for storing a platform configuration measurement program causing the processor to function to constitute the platform configuration measurement device.