Vehicle safety device with electronically coded access authorization
First Claim
1. In a vehicle safety device with electronically encoded access authorization, having a vehicle transmitter for transmitting random code information generated by the vehicle, a user unit for receiving said transmitted random code information, generating specific user code information based on the received random code information, and transmitting the user code information, and a vehicle user code evaluating unit for receiving user code information, extracting random code information contained therein, comparing the latter with corresponding random code information generated by the vehicle, and generating vehicle operation authorizing information only when the comparison result is positive, the combination comprising:
- a plurality of control devices, each having a random number generator for generating random code partial information, one such control device being arranged in and controlling operability of each of a plurality of vehicle systems whose function is required for operation of the vehicle; and
a random code partial information linking device having an input coupled to receive random code partial information from each of said control devices and an output coupled to the vehicle transmitter, which linking device links said random code partial information received from each of said control devices in a predetermined manner to form said random code information transmitted by said vehicle transmitter.
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Accused Products
Abstract
In the new vehicle safety device according to the invention, random code information used to control the release of an electronic drive-away block arrangement consists of a combination of a plurality of partial information generated separately in operationally essential vehicle units which are separated from one another. The partial information is combined in a linking unit connected with these units for total random code information. Even after a code data exchange protocol has been intercepted by an unauthorized person, the latter, because of the structure of the safety device, can operate the vehicle only by replacing all of these units, which renders such unauthorized use by strangers unattractive because of the manipulations and expense required for this purpose.
63 Citations
6 Claims
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1. In a vehicle safety device with electronically encoded access authorization, having a vehicle transmitter for transmitting random code information generated by the vehicle, a user unit for receiving said transmitted random code information, generating specific user code information based on the received random code information, and transmitting the user code information, and a vehicle user code evaluating unit for receiving user code information, extracting random code information contained therein, comparing the latter with corresponding random code information generated by the vehicle, and generating vehicle operation authorizing information only when the comparison result is positive, the combination comprising:
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a plurality of control devices, each having a random number generator for generating random code partial information, one such control device being arranged in and controlling operability of each of a plurality of vehicle systems whose function is required for operation of the vehicle; and a random code partial information linking device having an input coupled to receive random code partial information from each of said control devices and an output coupled to the vehicle transmitter, which linking device links said random code partial information received from each of said control devices in a predetermined manner to form said random code information transmitted by said vehicle transmitter. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification