DATA TRANSMISSION UNIT FOR A VEHICLE

• US 20160135054A1
• Filed: 11/05/2015
• Published: 05/12/2016
• Est. Priority Date: 11/06/2014
• Status: Active Grant

• Current Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Original Assignee: Dr Ing hc F Porsche AG (Volkswagen AG)
• Inventors: Maise, Timo
• Granted Patent: US 9,871,659 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 2209/76 Proxy, i.e. using intermediary entity to perform cryptographic operations network architectures or network communication protocols using hop-by-hop encryption H04L63/0464
• CPC Class Codes: H04L 2209/84 Vehicles
• CPC Class Codes: H04L 9/3247 involving digital signatures
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 12/12 Detection or prevention of fraud
• CPC Class Codes: H04W 12/50 Secure pairing of devices
• CPC Class Codes: H04W 4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]

Abstract

A method for transmitting data between a vehicle and a terminal, in which data to be transmitted are transmitted on the basis of at least one digital signature generated by a security module in a vehicle key for the vehicle, the vehicle key also comprising at least one interface for communicating with the terminal and/or the vehicle and at least one microprocessor, and the microprocessor being used to check a trustworthiness of the data to be transmitted via the interface. Also, a corresponding vehicle key and vehicle having a system for transmitting data.

Claims

1. A method for transmitting data between a vehicle and a terminal, in which data to be transmitted are transmitted on the basis of at least one private key stored by a security module in a vehicle key for the vehicle, the vehicle key also comprising at least one interface for communicating with the terminal and/or the vehicle and at least one microprocessor, and the microprocessor being used to check a trustworthiness of the data to be transmitted via the interface.

2. The method as claimed in claim 1, in which data which are to be transmitted from the terminal to the vehicle are first of all transmitted to the interface which is in the form of a transmitting/receiving unit of the vehicle key, whereupon the data to be transmitted are provided with at least one first digital signature by the security module included in the vehicle key, data to be transmitted from the vehicle to the terminal being provided with at least one second digital signature and likewise first of all being transmitted to the transmitting/receiving unit of the key and being checked for trustworthiness by the microprocessor, the data to be transmitted from the vehicle to the terminal being transmitted to the terminal together with a result of the check for trustworthiness and without the digital signature.

3. The method as claimed in claim 1, in which data which are to be transmitted from the terminal to the vehicle are first of all transmitted to the interface of the vehicle key via a secure channel, whereupon at least one first digital signature is created by the security module included in the vehicle key and the data to be transmitted to the vehicle are sent back to the terminal together with the at least one first digital signature, whereupon the terminal forwards the data to be transmitted to the vehicle with the at least one first digital signature, data to be transmitted from the vehicle to the terminal being provided with at least one second digital signature and being transmitted to the terminal, the terminal forwarding data received in this manner to the interface of the vehicle key for a check for trustworthiness, and the vehicle key forwarding a result of the check for trustworthiness to the terminal.

4. The method as claimed in claim 2, in which the digital signature is consistent, in the sense of asymmetrical cryptography, with the public key and the useful data.

5. The method as claimed in claim 1, in which data which are to be transmitted from the vehicle to the terminal and/or to the vehicle key are transmitted by a system which is included in the vehicle and consists of an antenna and a transceiver.

6. The method as claimed in claim 5, in which the system is solely used for communication in a vehicle-specific communication standard.

7. The method as claimed in claim 5, in which the system is used for communication in any desired communication standard.

8. A vehicle key for a vehicle, the vehicle key comprising a security module for securely transmitting data between a vehicle and a terminal, the security module being configured to provide respective data to be transmitted with at least one digital signature generated by the security module, and the vehicle key comprising an interface for communicating with a terminal and/or the vehicle and a microprocessor, and the microprocessor being configured to check a trustworthiness of the data to be transmitted by the interface.

9. The key as claimed in claim 8, the vehicle key comprising an interface in the form of a transmitting and receiving unit for transmitting and receiving data in a vehicle-specific communication standard.

10. A vehicle having a system comprising at least one transceiver and at least one antenna for transmitting data to a vehicle key as claimed in claim 8 and/or to a terminal.