Patent ID: 8732494

Claim:
A data processing apparatus comprising: a receiving unit configured to receive encrypted packet-data via a network; a processing unit configured to decrypt the encrypted packet-data received by the receiving unit; a control unit configured to decrypt the encrypted packet-data received by the receiving unit; a power supply unit configured to supply electronic power to the processing unit; and wherein the control unit transmits the encrypted packet-data received by the receiving unit to the processing unit in a case where the electronic power is being supplied to the processing unit when the receiving unit receives the encrypted packet-data, and decrypts the encrypted packet-data in a case where the electronic power is not being supplied to the processing unit when the receiving unit receives the encrypted packet-data, and wherein the control unit issues, to the power supply unit, an instruction to supply the electronic power to the processing unit, in a case where a port number obtained by decrypting the encrypted packet-data corresponds to a predetermined port number.