Communication system and the data receiving apparatus, a method for transferring data, the computer program product, and data providing apparatus

摘要

PROBLEM TO BE SOLVED: To provide a method for safely and efficiently controlling electronic equipment including RFID tags.;SOLUTION: This method comprises a step (STR1, STT1) for providing an initial authenticity index (AI₀); a step (STR2) for providing an initial variable as the current data provision device variable (PDVN_i) in a data provision device (PD); a step (STR3) for especially employing a one-way function as a function for the current data provision device variable (PDVN_i) and the initial authenticity index (AI₀) to provide the current authenticity index (PDAI_i) of the data provision device; a step for setting the initial authenticity index (AI₀) as the authenticity index (RDAI_i-1) of the preceding data receiving device by means of the data receiving device (RD); and an initialization step including a step (STT2) for providing the current authenticity index (RDAI_i) of the data receiving device in the data receiving device (RD).;COPYRIGHT: (C)2006,JPO&NCIPI