Vehicle Central Lock Antitheft via Bidirectional Encryption
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Solution Overview
Problem
Existing vehicle antitheft systems either fail to prevent theft effectively without additional hardware or require costly new devices to lock engines, as seen in traditional vehicle body and engine locking modes.
Innovation Solution
A central control antitheft method and system that performs identity verification via cipher matching between a remote control, central control system, and engine management system, enabling bidirectional encrypted communication for authentication and engine locking or unlocking without additional hardware, using secure algorithms like Keelog or AES.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional vehicle body antitheft mode is used with remote control and alarm device, then the system is simple and low cost, but it fails to substantially prevent the vehicle from theft
Solution Approach 1:
The patent merges the central control system's existing remote control functionality with engine management capabilities. The central control system performs identity verification for both the remote control and the engine management system, and can transmit alert status to lock the engine. This integration allows the existing system to provide both body antitheft and engine locking functions without adding separate hardware devices, thus improving theft prevention effectiveness while avoiding increased system complexity
Solution Approach 2:
The central control system is designed to perform multiple functions: it serves as the remote control receiver, the identity verification authority, the alert status manager, and the engine locking controller. By making the central control system universal and multi-functional, the patent eliminates the need for separate dedicated antitheft hardware, achieving enhanced security while maintaining system simplicity
2Reliability
If engine locking antitheft mode is used to substantially prevent theft, then theft prevention effectiveness is improved, but additional new hardware device is required which increases cost
Solution Approach 1:
The patent combines the engine locking function with the existing central control system rather than using a separate dedicated engine locking device. The central control system's microprocessor and communication interfaces are utilized for identity verification and engine locking control, merging multiple functions into existing hardware and thereby avoiding additional manufacturing costs
Solution Approach 2:
The central control system is configured to perform multiple roles including remote control reception, identity verification, alert status management, and engine locking control. This multi-functionality allows the system to provide robust engine locking protection without requiring separate dedicated hardware, thus maintaining ease of manufacture and low cost while achieving substantial theft prevention
3Reliability
If identity verification via cipher matching is implemented between remote control, central control system, and engine management system, then security is enhanced, but software complexity increases
Solution Approach 1:
The central control system acts as an intermediary that manages the identity verification process. It performs cipher matching with the remote control to verify its identity, then performs another cipher matching with the engine management system. This intermediary approach centralizes the cryptographic operations and simplifies the overall system architecture, enhancing security while managing software complexity through centralized control
Data Source
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AI summary
A vehicle central lock antitheft method and system includes a central lock system which is connected by radio with a remote controller for identity verification using rolling codes (S101, S102), wherein the central lock system chooses a security state (S103) and transmits the security state to an engine management system according to the verification result, the ignition IG status and the door switch status signal indicating opening or closing of the door (S104). The engine management system receives the security state transmitted by the central lock system and verifies the identity of the central lock system by code matching (S 106); security identification between the engine management system and the central lock system is carried out by bidirectional encryption communication (S107). The engine management system then decides whether or not to lock the engine according to the result of the security identification.