Patent ID: 9563996
Date: 2017-02-07
CPC Classifications: B60R,G07C

Claim:
1. Radio key for authenticating a user of a vehicle with respect to a door unlocking system of the vehicle and/or a drive start device of the vehicle comprising: a transponder unit which is designed to receive a query signal transmitted wirelessly from the vehicle and to transmit, depending on the received query signal, an authentication signal based on an authentication code, and a casing in which the transponder unit is arranged, wherein an area of the housing has a shape of an insertion area of a standardized memory card for a smartphone by means of which the memory card is to be stuck in accordance with the standard in an insertion slot of the smartphone, wherein the shape is based on a form factor of one of the following memory cards: a SD memory card, a micro SD memory card, or a nano SD memory card, characterized in that the transponder unit is designed a) to carry out a wired data exchange with the smartphone either only unidirectionally towards the transponder unit or not at all, so that it is not possible to read out the authentication code from the smartphone in which the radio key is inserted, and b) to be operated autonomously, so that no communication of authorization data to the smartphone occurs, and in that the radio key comprises a communication interface according to a standard for a communication interface for the memory card, and the radio key comprises a control device which is designed to receive code word data and/or identification data of the smartphone from the smartphone via the communication interface and to activate the transponder unit depending on the received data such that the radio key is only enabled for use with the vehicle in response to receipt of the code word data and/or the identification data from the smartphone.