Vehicle Smart Key Authentication Using Vibration-Based Count Signals
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Solution Overview
Problem
The existing smart key systems for vehicles are vulnerable to hacking, allowing unauthorized access and potential theft due to intercepted signals from hacking devices.
Innovation Solution
A smart key system that utilizes a vibration sensor to generate a count based on the smart key's movement, comparing this count with a pre-stored value to authenticate the signal, and locks the vehicle door if the count is abnormal, thereby preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a smart key system is implemented for convenient vehicle access, then user convenience is improved, but vulnerability to signal hacking increases
Solution Approach 1:
The patent changes the signal parameters by incorporating vibration-based count information into the smart key authentication signal. The vibration sensor detects physical movements of the smart key and generates count values that are embedded in the transmission signal, making the signal more difficult to hack while maintaining convenience.
Solution Approach 2:
The patent introduces a vibration sensor as an intermediary component that detects physical movements and converts them into count information. This intermediary adds an additional layer of authentication by verifying that the smart key is physically present and moved, not just transmitting a captured signal.
2Reliability
If vibration-based count authentication is added to detect hacked signals, then signal security is improved, but device complexity increases
Solution Approach 1:
The smart key device is designed with multi-functionality by integrating both the existing transmission function and the new vibration detection function into a single device. The vibration sensor and count generation capability are added to the smart key itself, allowing it to perform both authentication and anti-hacking functions without requiring separate systems.
Solution Approach 2:
The patent merges the vibration detection functionality with the existing smart key transmission system. The count information generated from vibration detection is combined with the original authentication signal, creating a unified multi-layered security approach rather than separate independent systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively distinguishes between legitimate and hacked signals, enhancing vehicle security by maintaining the door in a locked state when a hacked signal is detected, thereby preventing theft.
Implementation Method 1
a vibration sensor configured to detect vibration attributable to a movement or displacement of a main body
Data Source
AI summary
A smart key system for a vehicle includes a communication unit configured to communicate with a smart key, memory configured to store a code and a count that are included in a signal received from the smart key, and a processor configured to identify whether the smart key has been registered with the vehicle based on the signal, determine whether the count is normal by comparing the count with a pre-stored count, control a door of the vehicle in response to the code when the count is normal, and control the door to maintain a lock state when the count is not normal. The present disclosure has effects in that a signal of the smart key and a hacked signal can be easily distinguished and the security of a vehicle can be improved by using a count that is generated based on the vibration of the smart key.