SOFTWARE VALIDATION DEVICE, SOFTWARE VALIDATION METHOD, AND SOFTWARE VALIDATION PROGRAM

摘要

If a storage unit (111) stores an expected hash value that is an expected value of a hash value of start-up software, then a security calculation unit (110) compares the hash value of the start-up software with the expected hash value. A main calculation unit (109) activates the start-up software if the hash value of the start-up software and the expected hash value match, or stops the process if the hash value of the start-up software and the expected hash value do not match. If the storage unit (111) does not store the expected hash value, then the main calculation unit (109) performs signature verification on the start-up software, and if the signature verification is successful, the main calculation unit (109) stores the hash value of the start-up software in the storage unit (111) as an expected hash value, and activates the start-up software. If the signature verification is not successful, the main calculation unit (109) stops the process.