| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a smart system having a new technology of prohibiting relay of an RA relay of a relay station attack. <P>SOLUTION: The smart system includes: an in-vehicle system 10 that transmits a vehicle-side signal including predetermined vehicle-side data by radio; and a mobile unit 20 that determines whether the vehicle-side data included in the vehicle-side signal is valid or not on receipt of the vehicle-side signal, spread-modulates mobile-side data with a predetermined spread code when the data is determined to be valid, to transmit a mobile-side signal based on the spread modulation signal after spread modulation by radio. The in-vehicle system 10 spread-demodulates the mobile-side signal to obtain the mobile-side data, determines whether the obtained mobile-side data is valid or not, and unlocks a door when the data is determined to be valid. The mobile unit 20 adds a false signal which has not been spread-demodulated with the predetermined spread code to the mobile-side signal. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
