MUTUAL AUTHENTICATION SYSTEM, TOLL RECEIVING SYSTEM OF TOLL ROAD AND MUTUAL AUTHENTICATION METHOD OF TOLL RECEIVING SYSTEM

摘要

PROBLEM TO BE SOLVED: To perform mutual authentication by using a cryptographic key by radio even though the communication speed of an IC card is slow and calculation capability is small and to receive toll by providing an IC read/write device which reads information of an IC card of a facility user and 1st and 2nd authentication devices which are installed at the entrance and exit of the facility. SOLUTION: Communication between an IC card read/write device which is onboard unit (OBU) that is mounted on a passing vehicle and an entrance roadside system starts. When a passage ticket automatic issuing machine of the entrance roadside system recognizes the OBU, it gives passage permission to the vehicle. The passage ticket automatic issuing machine also sends a message authentication code that makes an IC card recognize as a correct roadside system. An exit traffic lane controller of an exit roadside system confirms a correct OBU, the same OBU at both entrance and exit and a legal IC card by confirming a message authentication code.