Vehicle-to-X Communication Module Signature Verification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current vehicle-to-X communication systems face challenges in ensuring the integrity and reliability of messages transmitted between vehicles and infrastructure, particularly in maintaining safety and security standards like ASIL B, which requires extensive checks and higher safety standards for all components involved.
Innovation Solution
A vehicle-to-X communication arrangement where a module receives and forwards messages with signatures to a decision unit for safety checks, allowing the module to operate at a lower safety standard while ensuring message integrity through signature verification and checks, thereby reducing complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle-to-X communication module performs comprehensive safety checks on all messages, then message integrity and security are improved, but device complexity and development costs increase
Solution Approach 1:
The patent divides the safety verification function into two segments: the vehicle-to-X communication module forwards messages with signatures to the decision unit, and the decision unit performs the safety checks. This segmentation allows the communication module to have lower complexity while maintaining message integrity through centralized verification at the decision unit level.
2Reliability
If the vehicle-to-X communication module operates at ASIL B safety standard, then system safety is improved, but development effort and costs increase
Solution Approach 1:
The patent extracts the safety verification functionality from the vehicle-to-X communication module and relocates it to the decision unit. This allows the communication module to operate at a lower safety standard (reducing development effort), while the decision unit—which already operates at high safety standards for other critical functions—performs the necessary ASIL B-level verification on incoming messages.
3Reliability
If signature verification is performed for every message, then security against modifications is improved, but processing time increases
Solution Approach 1:
The patent merges the signature verification process with the existing decision-making workflow at the decision unit. Since the decision unit already processes messages critically and operates at high safety standards, combining the verification function with its existing message processing tasks avoids duplicating work and minimizes additional processing time while maintaining security.
Data Source
AI summary
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.