Electronic key system, onboard apparatus, and portable apparatus

An electronic key system includes an onboard apparatus and a portable apparatus. The electronic key system establishes wireless communication with a secret key common between the onboard apparatus and the portable apparatus, and authenticates the portable apparatus registered as the portable apparat...

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Bibliographische Detailangaben
Hauptverfasser:	Katou, Kenji, Tokunaga, Yuuki
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE CHECKING-DEVICES ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY GENERATING RANDOM NUMBERS PERFORMING OPERATIONS PHYSICS REGISTERING OR INDICATING THE WORKING OF MACHINES TIME OR ATTENDANCE REGISTERS TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR VOTING OR LOTTERY APPARATUS WIRELESS COMMUNICATIONS NETWORKS
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Beschreibung
Zusammenfassung:	An electronic key system includes an onboard apparatus and a portable apparatus. The electronic key system establishes wireless communication with a secret key common between the onboard apparatus and the portable apparatus, and authenticates the portable apparatus registered as the portable apparatus of an authorized user. The portable apparatus includes a portable apparatus code transmitter that transmits a portable apparatus code. The onboard apparatus includes an onboard code transmitter that transmits an onboard code. The onboard apparatus further includes a portable apparatus code receiver, and an onboard-side key generation portion. The portable apparatus further includes an onboard code receiver, and a portable-apparatus-side key generation portion.