MICROPROCESSOR, NODE TERMINAL, COMPUTER SYSTEM AND PROGRAM EXECUTION CERTIFICATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a microprocessor capable of guaranteeing that memory contents are not illegally altered at the time of program execution, a node terminal provided with the microprocessor capable guaranteeing program execution, a computer system and a program execution certifying method. SOLUTION: The node terminal is provided with: an internal memory 42 for storing a program transmitted form a server 20; a CPU 41 for executing the program stored in the internal memory 42; a hash value calculating part 103 for operating a prescribed hash function for the program executed by the CPU when the program execution is finished; and a digital signature executing part 104 which is unique to the node 10 and uses a secret key stored in a secret key storing part 105 to perform the digital signature of the program to which the hash function is operated and the execution result of the program. COPYRIGHT: (C)2006,JPO&NCIPI