ELECTRONIC KEY DEVICE

PROBLEM TO BE SOLVED: To provide an electronic key device capable of preventing a lock from being reluctantly fastened and released by relay attack without impairing conventional responsiveness in authentication communication between a master unit and a slave unit.SOLUTION: An on-vehicle unit (maste...

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Bibliographic Details
Main Author HAMAMURA YUKIHIRO
Format Patent
LanguageEnglish
Published 11.07.2013
Subjects
ACCESSORIES THEREFOR
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
FIXED CONSTRUCTIONS
HANDCUFFS
KEYS
LOCKS
PERFORMING OPERATIONS
SAFES
SELECTING
TRANSPORTING
VEHICLES IN GENERAL
VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR
WINDOW OR DOOR FITTINGS
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Summary:PROBLEM TO BE SOLVED: To provide an electronic key device capable of preventing a lock from being reluctantly fastened and released by relay attack without impairing conventional responsiveness in authentication communication between a master unit and a slave unit.SOLUTION: An on-vehicle unit (master unit) 1 performs authentication communication with a portable unit (slave unit) 100, but a communication distance is prevented from being elongated and theft is prevented by making the portions of RF signals of two relays (1) 50 and (2) 70 used by of a thief in order to relay a communication signal to elongate the communication distance bi-directionally collide with each other. When authentication is unsuccessful in the case that the collision is bi-directionally made, and when authentication is successful in the case of one direction, authentication discordance is notified to a normal user and the normal user stops communication with the on-vehicle unit 1 by means of the portable unit 100 to prevent the theft.
Bibliography:Application Number: JP20110287288