Vehicle Certificate Validation With Online-Offline Authentication Switching
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Solution Overview
Problem
Existing external diagnostic devices require frequent manual download of certificate revocation lists (CRLs) due to their short validity periods, causing inconvenience and inefficiency, especially when connected via wired communication networks.
Innovation Solution
Implement a method for online certificate validation using a wireless communication method, and if wireless communication is unavailable, switch to offline validation using a wired method by providing a certificate revocation list (CRL) to authenticate external devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless communication is used for online certificate validation, then user convenience is improved and manual CRL downloads are eliminated, but system complexity increases due to communication availability checks and dual validation paths
Solution Approach 1:
The system automatically determines whether to use online or offline validation based on communication availability, eliminating the need for users to manually choose or configure validation methods. The controller autonomously selects the appropriate validation path (wireless online or wired offline) based on whether wireless communication is available, making the system self-serve and user-friendly despite the dual-validation complexity.
2Reliability
If offline validation with CRL is used, then system reliability is maintained without wireless communication, but user convenience deteriorates due to frequent manual CRL downloads
Solution Approach 1:
The validation system dynamically adapts its operation mode based on communication conditions. When wireless communication is available, it switches to online validation mode where the controller directly communicates with the certificate validation server, eliminating manual CRL downloads. When wireless communication is unavailable, it transitions to offline validation mode using the wired connection with CRL. This dynamic switching resolves the contradiction by making the system both reliable (always validates certificates) and convenient (automatically uses online mode when possible).
Data Source
AI summary
A certificate validation method of a vehicle may include: receiving, by a controller of a vehicle and from an external device, a certificate for authenticating the external device; and based on a determination that wireless communication is available between the controller and a certificate validation server: sending, by the controller and to the certificate validation server, the certificate without a certificate revocation list (CRL) for verification of validity of the certificate; and requesting the certificate validation server to validate the certificate without the CRL.