Tampering monitoring system, the management apparatus, the protection control module and the detection module

Management device 200d comprises decomposing a decryption key of the encrypted application program, an output unit 252d for outputting a plurality of distributed key generation unit 251d and a plurality of said distributed key to generate the distributed key to the plurality of detection modules. Each detection module stores the distributed key therein. Protection control module 120d includes an acquisition unit 381d for acquiring the distributed key from a plurality of detection modules, integrating a plurality of said distributed key, restoring section 382d for restoring the decryption key using the decryption key, the encrypted decoding unit decodes the application program 383d and after decoding end, comprising the erasing section 384d for erasing the decryption key.