Communication device, communication method, and communication system

A communication device comprising:

• a wireless transmitter and configured to transmit authentication key identification information for specifying an authentication key generated from a plurality of keys;
• a computer memory and configured to store the authentication key;
• and
• a processor configured to perform an authentication process for a transmission destination of the authentication key identification information using the stored authentication key,
• wherein the authentication key is generated and stored in a receiving device that receives the transmitted authentication key identification information, before the authentication key identification information is transmitted by the wireless transceiver.

A communication method comprising:

• storing;
• by a processor, an authentication key generated from a plurality of keys;
• receiving, by the processor, authentication key identification information for specifying the authentication key;
• and
• performing, by the processor, an authentication process for a transmission source of the authentication key identification information using the authentication key specified based on the authentication key identification information,
• wherein the authentication key is generated and stored before the authentication key identification information is received b the processor.

A communication method comprising:

• transmitting, by a processor, authentication key identification information for specifying an authentication key generated from a plurality of keys;
• storing, by the processor, the authentication key;
• and
• performing, by the processor, an authentication process for a transmission destination of the authentication key identification information using the stored authentication key,
• wherein the authentication key is generated and stored in a receiving device that receives transmitted the authentication key identification information, before the authentication key identification information is transmitted by the processor.

A communication system comprising:

• a first communication device;
• and
• a second communication device,
• wherein the first communication device includes
• a wireless transceiver configured to transmit authentication key identification information for specifying an authentication key generated from a plurality of keys,
• a computer memory configured to store the authentication key, and
• a processor configured to perform an authentication process for a transmission destination of the authentication key identification information using the stored authentication key, and
• the second communication device includes
• a second computer memory configured to store the authentication key generated from the plurality of keys,
• a second wireless transceiver configured to receive the authentication key identification information for specifying the authentication key, and
• a second processor configured to perform an authentication process for a transmission source of the authentication key identification information using the authentication key specified from the computer memory based on the authentication key identification information,
• wherein the authentication key is generated and stored in the second computer memory before the authentication key identification information is received by the second wireless transceiver.