| 摘要 |
A communication device configured to perform communication with at least one external device via a network using a secret key and an electronic certificate that includes information on a public key corresponding to the secret key, includes a storing system configured to store the secret key and the electronic certificate, a receiving system configured to receive an instruction to delete at least one of the secret key and the electronic certificate stored in the storing system, a revocation instructing system configured to instruct, via the network, a management device that manages a list of revoked electronic certificates to register the electronic certificate stored in the storing system with the list in response to the received instruction, and a deleting system configured to delete the at least one of the secret key and the electronic certificate in response to the received instruction.
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