Patent ID: 8732471

Claim:
A data communication method between a first computer and a second computer each including at least two processors, comprising: a transmission step of transmitting, from the first computer to the second computer, data containing a processor ID identifying one of the at least two processors provided for the first computer and an address ID identifying the second computer; a reply step of returning, from the second computer to the first computer, data containing the processor ID contained in the data transmitted in the transmission step, an address ID identifying the first computer, and a public key certificate relating to the second computer; a reception step of, on the first computer, receiving the data returned from the second computer; an acquisition step of, on the first computer, acquiring the processor ID contained in the data received in the reception step; a processing step of, on the first computer, causing the processor, which is the one of the at least two processors provided for the first computer, and is identified by the processor ID acquired in the acquisition step, to process the data received in the reception step, the processing being restricted to the processor identified by the processor ID acquired in the acquisition step; and an authentication step of, on the first computer, restricting the processing in the processing step according to a content of the public key certificate contained in the data received in the reception step.