Sensor System Coordinate Expansion for Asynchronous Data Security
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Solution Overview
Problem
Event cameras and other sensor systems that asynchronously output detection data, including time series information, face security vulnerabilities as unauthorized access can estimate entire data from fragmentary information, particularly when features like regularity in pixel data are present, making it difficult to secure data transmission and storage.
Innovation Solution
A sensor system that includes an expansion unit to increase the value range of coordinate information, a conversion unit to alter change information values, an arrangement change unit to rearrange data, and a transmission order change unit to alter the order of pixel data transmission, all of which are processed by the transmission device and restored by the reception device, effectively eliminating recognizable patterns in the data that could be exploited for unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fragmentary information is transmitted from the sensor, then data transmission efficiency is improved, but security is worsened because unauthorized access can estimate entire data from the fragmentary information
Solution Approach 1:
The patent applies parameter changes by expanding the coordinate values to a wider range than the actual sensor pixel coordinates. This transformation changes the statistical parameters of the data distribution, making it difficult for unauthorized access to estimate the original data even when fragmentary information is transmitted. The expansion unit expands coordinate values within the range representable by the number of bits assigned to the coordinate information, thereby enhancing security while maintaining transmission efficiency.
2Measurement precision
If coordinate information is transmitted with full precision, then measurement precision is improved, but data transmission volume increases
Solution Approach 1:
The patent applies partial action by transmitting only fragmentary information (changed pixel data) rather than complete frame data. The expansion unit then processes only this partial data to expand coordinate values, rather than processing all pixel data. This approach maintains measurement precision for the transmitted coordinates while minimizing data transmission volume by focusing only on changed pixels.
3Ease of operation
If data is transmitted in original format, then ease of operation is improved, but security is worsened due to recognizable patterns
Solution Approach 1:
The patent applies preliminary action by performing coordinate expansion and data transformation before transmission. The expansion unit pre-processes the coordinate information to expand its range, and the transmission unit transmits this transformed data. This preliminary transformation eliminates recognizable patterns before transmission, enhancing security while the reception device can restore the original format for processing, maintaining ease of operation.
Data Source
AI summary
A sensor system includes: a transmission device that includes a sensor which asynchronously outputs detection data including time series information; and a reception device connected to the transmission device via a transmission line. The detection data includes coordinate information, and the transmission device includes an expansion unit configured to expand a value of the coordinate information within a range of the number of bits assigned to the coordinate information, in a case where the detection data is acquired from the sensor, and a transmission unit configured to transmit expanded detection data in which the value of the coordinate information is expanded by the expansion unit to the reception device via the transmission line.