Designation method of 1st transmitter and common key with 2nd transmitters, and, designated device of 1st transmitter and common key with 2nd transmitters

摘要

Those where it becomes problem the occasion where the critical data of security is transmitted to the 2nd transmitter from the 1st transmitter which is only small calculation ability or small memory capacity are that big request is assigned in calculation ability and memory capacity, by the protocol which is necessary for the appointment of mutual certification and the common key. Therefore, topic of this invention offers the designation method of mutual certifying and the common key with the 1st transmitter and the 2nd transmitter, it is necessary calculation ability and to decrease memory capacity in comparison with known solution expedient until recently. This topic is solved by providing the designated protocol of certification and the common key whose demand for the existing computer structure is small.