Volkswagen Ag

Robert Boschgmbh

Dominique Nemetschek

Stephan Max

Andreas Thiele

Christoph Fricke

Stephan Schmitz

Andreas Titze

Karsten Beyer

Julian Verkin

Pedro Almeida

Peter Lohmann

Michael Meier

Mirko Steinberg

Claudia Prauße

Artur Skrobanski

A method for calibrating a radio-based keyless access system of a transportation vehicle, an access system, and a corresponding transportation vehicle. Based on a measured field strength of an LF field, it is determined whether the signal transmitter is located at most at a specified distance from the transportation vehicle. A second transmission device emits a higher-frequency calibration signal in response to which the signal transmitter transmits a response signal back to the transportation vehicle. A reference distance from the signal transmitter to the transportation vehicle is automatically determined from the propagation time of the calibration signal and the response signal. The measured LF field strength-based determination of whether the signal transmitter is located at most at a specified distance from the transportation vehicle is then calibrated automatically based on the determined reference distance.

Method for calibrating a radio-based keyless access system of a motor vehicle, access system, and motor vehicle

The performance of an action for a transportation vehicle, wherein a relay attack is prevented. In response to a transmission of a first radio signal at a first frequency, on the one hand, a second radio signal at a second frequency is received from an ID transponder authorized for the transportation vehicle and, on the other hand, a further radio signal at the first frequency is received. The action is performed for the transportation vehicle only in response to the second radio signal originating from an ID transponder authorized for the transportation vehicle and only in response to the signal strength of the further radio signal lying below a predefined signal strength threshold.

Defense of a relay station attack

An apparatus, a key partner, methods and computer programs for a key module of a vehicle and a vehicle. The apparatus for the key module includes a communication interface for radio communication with a key partner of the vehicle, a motion sensor, and a control module for controlling an operating state from operating states of the key module based on the information about the motion of the key module. The operating states include at least a first operating state, a pre-shutdown operating state and a shutdown state. The control module activates the first operating state if the motion of the key module is above a motion limit value and activates the pre-shutdown operating state if the motion of the key module is below the motion limit value over a period of time.

Apparatus, key remote, and method for controlling operating conditions of a key module

A method is for controlling entry, e.g., into a motor vehicle, during which a key and a base station wirelessly exchange authentication data between one another in an active or a passive communication mode. At the beginning of the authentication process, the base station transmits a call signal to the key, and the key replies to the call signal with a reply signal. The base station verifies the received reply signal of the key in the communications mode in which the reply signal was received. If the reply signal of the key was received in the active communications mode, the base station transmits a first selection instruction to the key thus causing the key to perform the subsequent communication in the active communications mode. If the reply signal of the key was received in the passive communications mode, the base station transmits a second selection instruction to the key thus causing the electronic key to perform the subsequent communication in the passive communications mode.

Method and device for controlling entry into a secured location, especially into a motor vehicle

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Velpke, Germany

Dominique Nemetschek