An information management method, executed by an information management apparatus configured to issue an electronic certificate that certifies a hardware configuration of a calculator and a hardware monitoring apparatus mounted on the calculator, the information management method comprising:
- detecting, by the hardware monitoring apparatus, a change of hardware of the calculator using the electronic certificate;
- generating, by the hardware monitoring apparatus, hardware configuration information for specifying content of the detected change of the hardware;
- transmitting, by the hardware monitoring apparatus, the hardware configuration information to the information management apparatus;
- acquiring, by the information management apparatus, hardware change information for specifying the hardware changed in the calculator;
- comparing, by the information management apparatus, the acquired hardware change information with the transmitted hardware configuration information, and determining whether the hardware change information and the hardware configuration information are consistent;
- and
- updating, by the information management apparatus, the electronic certificate when the hardware change information and the hardware configuration information are consistent.