CONTROL SYSTEM

PROBLEM TO BE SOLVED: To provide a control system in which damage caused by a relay attack can be suppressed effectively by determining whether or not the relay attack is performed by providing such a structure as to correct an error of a clock between a key that a legal owner has and a vehicle from...

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Bibliographic Details
Main Author TOKUNAGA HIROKI
Format Patent
LanguageEnglish
Published 09.09.2013
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PERFORMING OPERATIONS
SELECTING
TRANSPORTING
VEHICLES IN GENERAL
VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR
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Summary:PROBLEM TO BE SOLVED: To provide a control system in which damage caused by a relay attack can be suppressed effectively by determining whether or not the relay attack is performed by providing such a structure as to correct an error of a clock between a key that a legal owner has and a vehicle from a signal transmitted from the vehicle to the key in a smart key system.SOLUTION: From a polling signal transmitted from a vehicle to a smart key, a clock frequency of a clock that the vehicle includes is detected at a side of the smart key, and an identification signal of the smart key is returned as a signal of a predetermined frequency by a vehicle-side clock. In the vehicle, the received identification signal is collated and it is also determined whether a frequency of the identification signal is a proper value in a view from the vehicle-side clock. Only when a determination result is positive, vehicle door unlocking or engine starting is allowed. In the case that a relay attack is performed, a repeater of a criminal is interposed, and thereby the vehicle-side clock cannot be generated appropriately at a key side.
Bibliography:Application Number: JP20130096224