Device-Specific Random Number Generation for Secure Authentication
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Solution Overview
Problem
Existing electronic control devices lack the ability to generate unique and varied random numbers each time, which is crucial for secure authentication and diagnosis processes.
Innovation Solution
The electronic control device incorporates a unique value acquisition unit to obtain a unique value and an inherent value, such as a device ID, and uses these values along with the number of generation times of random numbers to generate a different random number each time, ensuring high variance and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pseudo random number generator is used, then random numbers can be generated, but the generated numbers lack uniqueness and high variance across different devices and generation attempts
Solution Approach 1:
The patent combines multiple data sources (unique device identifiers, inherent device characteristics, and generation attempt counters) into a single random number generation process. This merging of diverse inputs ensures that each generated random number is unique to both the device and the specific generation attempt, resolving the contradiction between reliability and complexity by integrating existing device components rather than adding entirely new systems.
Solution Approach 2:
The patent performs preliminary acquisition of unique device values and inherent characteristics before the random number generation process. By pre-fetching and storing these identifying parameters, the system ensures that when random numbers are generated, they immediately incorporate device-specific identifiers, guaranteeing uniqueness without requiring complex real-time verification during the generation process itself.
2Reliability
If random numbers are generated using only standard algorithms, then generation is simple, but authentication security is insufficient
Solution Approach 1:
The patent applies local quality by incorporating device-specific identifying parameters (unique identifiers and inherent characteristics) into the random number generation process. This ensures that each device produces locally unique random numbers tailored to its specific identity, enhancing authentication security without requiring a completely centralized or complex system-wide solution.
Solution Approach 2:
The patent changes the parameters of random number generation by incorporating multiple varying inputs including device identifiers, inherent characteristics, and generation attempt counts. By varying these parameters with each generation attempt, the system enhances security against replay attacks while maintaining a relatively simple implementation that builds upon standard random number generation algorithms.
3Object-affected harmful factors
If the same random number generation method is used across devices, then implementation is consistent, but vulnerability to unauthorized access increases
Solution Approach 1:
The patent segments the random number generation process by dividing it into device-specific components (unique identifiers and inherent characteristics) and common components (generation algorithm). This segmentation allows each device to have its own personalized security parameters while still using a standardized base algorithm, reducing vulnerability to unauthorized access while maintaining ease of implementation through consistent core methodology.
Data Source
AI summary
A plurality of random numbers is generated in an electronic control device having a function of generating the plurality of random numbers. A unique value that is different each time one of the random numbers is generated is acquired. An inherent value that is inherent to the electronic control device is acquired. One of the random numbers is generated using the unique value and the inherent value.