Patent ID: 8811613

Claim:
A communication system, comprising: a first device and a second device for performing communications, a first device including circuitry configured to send a list indicating capabilities regarding each encryption algorithm which is capable of being used by the first device from the first device to the second device, receive identification information that identifies an encryption algorithm from the capability list, receive a key, create a session key after a reception of the identification information based on the encryption algorithm identified by the identification information, wherein the circuitry is further configured to send the session key encrypted by the received key, the second device including circuitry configured to receive the list indicating the capabilities, determine the encryption algorithm, which is available for use by the first device to create the session key based on the list indicating the capabilities from the first device and based on which level of strength of encryption is required for the communications, send the identification information and the key, and receive the session key encrypted by the key.