Vehicle Diagnostic Access Control with Authentication Rejection Identification
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Solution Overview
Problem
Conventional vehicle diagnostic systems fail to distinguish between authentication rejections from central gateways and electronic control units, leading to ambiguity in identifying which component has rejected the authentication of a vehicle diagnostic device.
Innovation Solution
An apparatus and method that includes a communicator, connector, and controller to perform primary and secondary authentication of a vehicle diagnostic device, transmitting specific response IDs and failure messages to clarify which component has rejected the authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the central gateway performs primary authentication and the ECU performs secondary authentication, then the authentication security is improved, but the ability to identify which component rejected authentication deteriorates
Solution Approach 1:
The patent segments the authentication failure information by creating distinct response message structures for primary authentication failure (from CGW) and secondary authentication failure (from ECU). Each authentication stage has its own standardized response format, allowing the diagnostic device to identify which component rejected authentication based on the response structure rather than receiving identical generic rejection messages from both components.
2Device complexity
If the same response ID and response message are transmitted for both primary and secondary authentication failures, then the communication protocol simplicity is improved, but the diagnostic accuracy deteriorates
Solution Approach 1:
The patent applies local quality by customizing the response message content and structure according to the specific authentication stage where failure occurs. Primary authentication failures from the CGW receive one standardized response format, while secondary authentication failures from the ECU receive a different standardized format. This allows the diagnostic device to accurately determine which component rejected authentication while maintaining structured and standardized communication protocols.
Data Source
AI summary
Disclosed is an apparatus for controlling access of a vehicle diagnostic device and a method thereof, in which the apparatus includes a communicator that provides a communication interface with the vehicle diagnostic device, a connector that provides a connection interface with an electronic control unit (ECU) in a vehicle, and a controller that performs primary authentication of the vehicle diagnostic device when the vehicle diagnostic device requests a diagnosis from the ECU, transmits a first response ID and a first failure message to the vehicle diagnostic device when the primary authentication fails, and forwards the first response ID and a second failure message from the ECU to the vehicle diagnostic device when the primary authentication is successful.