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US 12,003,513 B2Granted
Vehicle-to-X communication arrangement and method for receiving vehicle-to-X messages
OwnerJürgen Kunz, Marc Menzel +1inventors
InventorsJürgen Kunz, Marc Menzel, Felix Hagenmeyer
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Abstract
A vehicle-to-X communication arrangement has a decision unit and a vehicle-to-X communication module, wherein the vehicle-to-X communication module forwards vehicle-to-X messages together with a signature to the decision unit which performs a safety check using the respective signature.
Claims8
A vehicle-to-X communication arrangement comprising:
- a vehicle-to-X communication device that has a functional-safety level below Automotive Safety Integrity Level B (ASIL B) and that is configured to receive vehicle-to-X messages having a respective signature and to forward said messages in an unmodified condition including the signature;
- a control module of a motor vehicle, wherein the control module performs driving-assistance functions in compliance with at least the ASIL B functional-safety level, and the control module is configured to receive the forwarded vehicle-to-X messages and to perform a safety check with each forwarded message based on each forwarded message's respective signature;
- wherein the vehicle-to-X communication device comprises:
- a PHY/MAC layer, a network layer, and a security layer;
- wherein the control module of the motor vehicle comprises:
- a facility layer and an application layer;
- wherein the control module of the motor vehicle and the vehicle-to-X communication device are connected to each other by a vehicle bus in order to exchange data and are each configured to independently execute a respective signature verification of a vehicle-to-X message by decrypting a hash value that is contained in the signature with a public key that is also contained in the signature, calculating a hash value from the vehicle-to-X message, and determining whether the decrypted hash value is identical to the calculated hash value in order to ensure that the control module of the motor vehicle performs driving-assistance functions in compliance with at least the ASIL B functional-safety standard, while the vehicle-to-X communication module complies with a functional-safety standard lower than the ASIL B.
4 more elements
A method for receiving vehicle-to-X messages comprising:
- receiving, by a vehicle-to-X communication device that has a functional-safety level below Automotive Safety integrity, Level B (ASIL B), respective vehicle-to-X message together with the associated signature in a vehicle-to-X communication module;
- forwarding, by the vehicle-to-X communication device and via a vehicle bus, the vehicle-to-X message in an unmodified format with the associated signature to a control module of a motor vehicle, wherein the control module performs driving-assistance functions in compliance with at least the ASIL B functional-safety level;
- executing of a safety check for each forwarded vehicle-to-X message based on the respective signature by the control module of the motor vehicle;
- wherein the vehicle-to-X communication module comprises:
- a PHY/MAC layer, a network layer, and a security layer;
- wherein the control module of the motor vehicle comprises:
- a facility layer and an application layer;
- executing a signature verification of a vehicle-to-X message with the control module of the motor vehicle and the vehicle-to-X communication module independently from one another by decrypting a hash value that is contained in the signature with a public key that is also contained in the signature, calculating a hash value from the vehicle-to-X message, and determining whether the decrypted hash value is identical to the calculated hash value in order to ensure that the control module of the motor vehicle performs driving- assistance functions in compliance with at least the ASIL B functional-safety standard, while the vehicle-to-X communication module complies with a functional- safety standard lower than the ASIL B.
5 more elements
Dependencies are inferred from the claim text.