Patent ID: 7840817

Claim:
A data transmission apparatus comprising: an input section, arranged to input image data to be stored in a data reception apparatus; a transmitter, arranged to transmit data to the data reception apparatus; a receiver, arranged to receive, response data with encrypted key information generated from key information held in the data reception apparatus as a response of the data reception apparatus to challenge data transmitted by the transmitter when the input section inputs the image data; an authentication section, arranged to authenticate the data reception apparatus based on the challenge data and the response data; a decryption section, arranged to decrypt, in the case that the authentication is successful, the encrypted key information to acquire the key information; and an encryption section, arranged to encrypt the input image data using the key information decrypted by the decryption section to transmit the encrypted image data by the transmitter; wherein the data reception apparatus receives the encrypted image data from the data transmission apparatus, and stores the received encrypted image data in a memory.