Vehicle-External Device Authentication for Driving Level Validation
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Solution Overview
Problem
Determining the current driving automation level of a vehicle equipped with an external automated driving system is challenging due to the varying levels of automation that can be achieved with different external devices, which affects responsibility and safety.
Innovation Solution
An authentication method is implemented where the vehicle and external device exchange certificates to validate a combination certificate, ensuring the system-wide driving automation level is accurately determined through device authentication, using a first certificate for the vehicle, a second certificate for the external device, and a third certificate for their combination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an external device is attached to a vehicle to enhance automated driving capabilities, then the driving automation level is improved, but it becomes difficult to determine the system-wide driving automation level and allocate responsibility
Solution Approach 1:
The patent implements a nested certificate structure where a third certificate (combining vehicle and external device information) is validated based on the first certificate (vehicle) and second certificate (external device). This nested validation approach allows the system to determine the system-wide driving automation level by hierarchically verifying certificates, ensuring that the combined automation level is properly established when an external device is attached to the vehicle.
2Reliability
If device authentication is performed between vehicle and external device, then the validity of the combination is certified, but the authentication process and certificate management become more complex
Solution Approach 1:
The patent segments the authentication process into distinct certificate types: a first certificate for the vehicle, a second certificate for the external device, and a third certificate for their combination. This segmentation allows each component to be authenticated independently while maintaining an overall system certificate, thereby managing complexity through structured division of authentication responsibilities.
Solution Approach 2:
The patent introduces a certificate validation mechanism that acts as an intermediary between the vehicle and external device authentication processes. The third certificate serves as a mediator that combines the validity information from the first and second certificates, allowing the system to verify the combined automation level without requiring direct complex interaction between all authentication components.
Data Source
AI summary
An authentication method is used by an automated driving system that includes a vehicle and an external device, the external device communicating with the vehicle to cause the vehicle to implement automated driving. The vehicle holds a first certificate that certifies validity of the vehicle. The external device holds a second certificate that certifies validity of the external device. The authentication method includes: validating a third certificate that certifies validity of a combination of the vehicle and the external device, in accordance with a result of device authentication performed between the vehicle and the external device by reference to the first certificate and the second certificate.