Patent ID: 6970317

Claim:
A recording medium controlling method which is carried out by a recording medium supportable device having interface means capable of, with respect to a recording medium having memory means for storing identification information proper to the recording medium and communication means for executing non-contact data transfer with respect to the memory means, non-contact data transfer to/from the memory means by enabling execution of radio communication to/from the communication means, the method comprising: an authentication step of sequentially communicating with the recording medium by using successive communication identifiers, thus confirming the identification information stored in the memory means of the recording medium and authenticating the recording medium; a communication identifier provision step of setting a communication identifier for the recording medium authenticated at the authentication step and providing the communication identifier for the memory means of the recording medium; and a control step of specifying the recording medium by a command including the communication identifier and carrying out operation control of the memory means of the recording medium, wherein at the authentication step, the identification information is confirmed by n stages of communication using first to n-th successive communication identifiers, and wherein the communication identifier provided for the memory means further comprises a communication identifier reset step of resetting to an initial value at the communication identifier provision step.