Idling Stop Control Device Authentication History
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Solution Overview
Problem
Vehicles equipped with smart entry systems and idling stop systems face challenges in preventing theft and ensuring engine restartability when authentication fails due to relay attacks, which compromise the antitheft performance and restartability from idling stop.
Innovation Solution
An idling stop control device with an authenticator, storage, and getting-off detector that performs periodic authentication and stores authentication history, allowing engine restart only when successful authentication is recorded and no occupant getting-off is detected, thereby enhancing antitheft performance and restartability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ID authentication is performed via wireless communication between authenticator and mobile device, then antitheft performance is improved, but authentication may fail due to radio wave interference from other vehicles causing engine restart failure
Solution Approach 1:
The system performs authentication in advance during vehicle travel and stores the authentication result and timestamp in storage. When idling stop restart is requested, the engine restart permitter checks the stored authentication history rather than requiring real-time wireless authentication, thus preventing radio wave interference from causing authentication failure while maintaining security through pre-verified credentials.
2Reliability
If authentication is required for engine restart, then security is improved, but engine restartability is reduced when authentication fails due to relay attacks or key loss
Solution Approach 1:
The system performs authentication during vehicle travel and stores the result in advance. When the vehicle stops and restart is needed, the engine restart permitter checks the pre-stored authentication history, allowing restart without requiring real-time re-authentication. This eliminates the need for continuous wireless communication during restart operations.
Solution Approach 2:
The storage unit acts as an intermediary between the authenticator and the engine restart permitter. It stores authentication results and timestamps, allowing the engine restart permitter to verify credentials without direct real-time communication with the mobile device, thus decoupling the security verification from the restart operation.
3Reliability
If periodic authentication is performed during travel, then authentication reliability is improved, but device complexity increases due to storage and history management requirements
Solution Approach 1:
The system extracts only the essential authentication verification elements (authentication result and timestamp) from the complete authentication process and stores them in the storage unit. This minimal data extraction approach provides sufficient reliability for restart permission decisions without requiring complex storage structures or extensive history management.
Data Source
AI summary
An idling stop control device includes an authenticator, a storage, a getting-off detector, and an engine restart permitter. The authenticator is installed in a vehicle, performs authentication via a wireless communication with a mobile device, and repeatedly performs, while the vehicle travels, an authentication operation at predetermined intervals. The storage stores result and time of authentication as the authentication history during travel. The engine restart permitter determines permission or prohibition of restart of the engine in accordance with the authentication history and getting-off information, permits restart of the engine when the authentication is successful and permits, in a case where the authentication fails, restart of the engine when a history of success of authentication has been stored in the storage during travel and the getting-off is not detected after the authentication has been successful.