| 摘要 |
PROBLEM TO BE SOLVED: To provide a security device of the toll collection device for a toll road which can effectively prevent a cipher key group from being exposed. SOLUTION: A moving-body-side controller is equipped with an IC card 1 and an on-vehicle machine 7 where the IC card is inserted and extracted. Here, the iC card 1 is stored with data representing a moving-body-side cipher key group K3 and a road-side controller 21 is stored with data representing a road-side cipher key group K4; and at least one of the road-side controller 2 and moving-body-side controller decides whether or not the moving-body-side cipher key group K3 and road-side cipher key group K4 match each other. |
