Communication control device and communication control system

A communication control system, comprising:

• a first communication control device connected to a first device and a network communication network;
• and
• a second communication control device connected to a second device and the network communication network,
• wherein the first communication control device comprises:
• a communication unit configured to:
• communicate with a first device and a second device;
• wirelessly communicate with at least one of the first device and the second device;
• and transmit data acquired by the first device to the second device;
• a notification unit configured to cause the communication unit to transmit predetermined information to the second device when a state of communication with the first device is a predetermined state or behavior of the communication control device is predetermined behavior;
• a first authentication unit;
• and
• a first control unit configured to:
• request the first authentication unit to perform at least one of a mutual authentication process of performing mutual authentication using a secret key and a first certificate issued by a private certificate authority in communication with the second communication control device and an encryption/decryption process of encrypting information to be transmitted to the second device by the first device using a common key determined by the mutual authentication process and decrypting information transmitted to the first device by the second device;
• transmit the encrypted information to the second communication control device;
• and
• transmit the decrypted information to the first device, and
• wherein the second communication control device comprises:
• a second authentication unit;
• and
• a second control unit configured to:
• request the second authentication unit to perform at least one of a mutual authentication process of performing mutual authentication using a secret key and a second certificate issued by the private certificate authority in communication with the first conununication control device and an encryption/decryption process of encrypting information to be transmitted to the first device by the second device using a common key determined by the mutual authentication process and decrypting information transmitted to the second device by the first device;
• transmit the encrypted information to the first communication control device;
• and
• transmit the decrypted information to the second device.