The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 2015
Filed:
Jan. 26, 2011
Jasja Tijink, Breitenfurt, AT;
Refi-tugrul Güner, Baden, AT;
Georg Karner, Vienna, AT;
Kapsch TrafficCom AG, Vienna, AT;
Abstract
A system and method for Dedicated Short-Range Communication (DSRC) between beacons and onboard units of a road toll system, wherein the beacons have a system-wide key and the onboard units have only individual keys, which are respectively formed from the system-wide key on the basis of a derivation code specific to the onboard units, wherein upon a communication from the onboard unit the derivation code is transmitted to the beacon in order to enable the beacon to emulate the individual key to encrypt/decrypt the communication with the onboard unit and/or for access to data stored in the onboard unit, and wherein upon communications with consecutive beacons the onboard unit transmits varying derivation codes.