Vehicle Data Recorder Wireless Authentication via Random Codes
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Solution Overview
Problem
Existing methods for transmitting control data between a vehicle data recording device and a testing device lack security and convenience, requiring complex cable connections and not allowing for on-site verification by regulatory authorities without entering the vehicle.
Innovation Solution
A method using a random code as a connection identifier for authentication between the vehicle data recording device and the testing device, establishing a secure short-range radio link, such as Bluetooth, where the random code is displayed or transmitted acoustically or optically, and new codes are generated for each data transmission to enhance security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex cable connection is used between the vehicle data recording device and the testing device, then data transmission security is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent replaces the mechanical cable connection system with a wireless short-range radio link (Bluetooth) for data transmission between the vehicle data recording device and testing device. This substitution eliminates the need for physical cable connections while maintaining secure communication through cryptographic authentication based on randomly generated connection codes, thereby improving ease of operation without compromising security.
2Reliability
If a random code authentication system is implemented, then security against manipulation is improved, but ease of operation deteriorates due to additional authentication steps
Solution Approach 1:
The vehicle data recording device automatically generates and manages random connection codes for authentication, eliminating the need for manual security configuration by the operator. The device performs self-authentication with the testing device using these randomly generated codes, providing high security against manipulation while keeping the operation simple for the user who only needs to initiate the connection process.
3Ease of operation
If a short-range radio link is used for data transmission, then ease of operation is improved, but security against interference and manipulation worsens
Solution Approach 1:
The patent implements preliminary authentication using randomly generated connection codes before actual data transmission begins. The vehicle data recording device and testing device establish cryptographic security parameters in advance through this authentication exchange, ensuring that the subsequent wireless data transmission is protected against interference and manipulation even though the radio link itself is inherently less secure than wired connections.
Data Source
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AI summary
A random code is generated and provided by vehicle data recording device (2) as connection code comprising a connection identification identifier. The random code is detected and input into a test device (4). The devices are automatically coupled via a short-distance radio link (8) after the random code has been input into the test device. The control data is transmitted to test device via short-distance radio link. The short-distance radio link between devices is separated after control data transmission has ended. The random code in devices is deleted. An independent claim is included for system for transmitting control data.