Vehicle Key Security Module for Secure Data Transmission
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Solution Overview
Problem
Existing methods for transmitting data between vehicles and terminals lack secure communication protocols, particularly in vehicle-specific standards, which are not compatible with civil communication protocols, leading to potential security gaps and unauthorized data manipulation.
Innovation Solution
A vehicle key system that uses a security module to generate private keys for secure data transmission, incorporating a microprocessor for trustworthiness checks and supporting both vehicle-specific and civil communication standards, ensuring secure data exchange via digital signatures and secure connections like Bluetooth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vehicle-specific communication protocols (e.g., IEEE 802.11p) are used for data transmission between vehicle and terminal, then communication reliability and security are improved, but compatibility with general public communication protocols deteriorates
Solution Approach 1:
The patent introduces a vehicle key as an intermediary device that bridges the gap between vehicle-specific communication protocols and general public protocols. The vehicle key contains both a first interface for vehicle-specific protocols (IEEE 802.11p) and a second interface for general public protocols (Bluetooth, WiFi), enabling secure vehicle-to-vehicle communication while maintaining compatibility with terminal devices using standard protocols.
Solution Approach 2:
The vehicle key is designed with multi-functionality to support multiple communication protocols simultaneously. It incorporates interfaces for both vehicle-specific protocols (for secure vehicle-to-vehicle communication) and general public protocols (for terminal compatibility), making it a universal device that can operate in various communication environments without requiring separate devices for each protocol type.
2Reliability
If digital signatures and private keys are implemented for data authentication, then data trustworthiness and security are improved, but device complexity and computational requirements worsen
Solution Approach 1:
The patent extracts the complex cryptographic operations (digital signature generation and verification) from the main communication flow and concentrates them in a dedicated security module within the vehicle key. This modular approach isolates the computational complexity to a specific component, allowing the rest of the system to remain relatively simple while still achieving secure data authentication through the security module's specialized functions.
3Reliability
If secure connections like Bluetooth are used for data transmission, then communication security is improved, but transmission range and accessibility worsen
Solution Approach 1:
The patent segments the communication function into different interfaces with different characteristics. The vehicle key includes a first interface for vehicle-specific protocols (providing secure vehicle-to-vehicle communication) and a second interface for general public protocols (providing terminal connectivity). This segmentation allows each interface to be optimized for its specific purpose, with the Bluetooth interface providing secure terminal communication while the vehicle-specific interface handling the data transmission between vehicles.
Data Source
AI summary
A method for transmitting data between a vehicle and a terminal, in which data to be transmitted are transmitted on the basis of at least one digital signature generated by a security module in a vehicle key for the vehicle, the vehicle key also comprising at least one interface for communicating with the terminal and/or the vehicle and at least one microprocessor, and the microprocessor being used to check a trustworthiness of the data to be transmitted via the interface. Also, a corresponding vehicle key and vehicle having a system for transmitting data.