Data transmitting and receiving system, data processing apparatus, and encoding communication method

摘要

A data processing apparatus, comprising: an encoding unit to encode data to be transmitted, produce header information including identification information for specifying a key enabling decoding the encoded data, encode the produced header information by using a key of a transmission destination, and add the encoded header information to the data to be transmitted to produce header-added encoded data; and a transmission unit to transmit the header-added encoded data encoded by the encoding unit to a data processing apparatus of a transmission destination through a communication network.