Communication device and computer program product

A communication device comprising:

• a first communicating unit configured to perform communication via a second network with a key generating device, the key generating device being configured to generate a cryptographic key to be used in cryptographic communication with an external device via a first network;
• and
• a control unit configured to performs control to transmit an address registration request containing address information to the key generating device via the first communicating unit when a predetermined specific request is issued from among requests used in the cryptographic communication.

A computer program product comprising a computer-readable medium containing a program executed by a computer, the program causing the computer to execute:

• performing, by a first communicating unit, communication via a second network with a key generating device, the key generating device being configured to generate a cryptographic key to be used in cryptographic communication with an external device via a first network;
• and
• performing control to transmit an address registration request containing address information to the key generating device via the first communicating unit when a predetermined specific request is issued from among requests used in the cryptographic communication.