Trail Recording System for Sensor Data Integrity Verification
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Solution Overview
Problem
Existing trail recording systems cannot verify the integrity of sensor data without using all the sensor data, making it difficult to determine tampering when only part of the data is reported.
Innovation Solution
A trail recording system comprising a trail recording apparatus and a report receiving apparatus that generates and verifies trail data using measurement values from sensors, allowing for the verification of tampering even when only partial sensor data is reported by employing a system with a trail recording program and a trail audit program to create and audit trail data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If only part of sensor data is reported to protect privacy and reduce data transmission, then data transmission efficiency and privacy protection are improved, but the ability to verify data integrity is worsened
Solution Approach 1:
The patent segments sensor data into two parts: original sensor data for processing and trail data (hash values) for verification. The trail recording apparatus calculates hash values from the original sensor data and transmits only the trail data to the report receiving apparatus. This segmentation allows the system to transmit minimal data while maintaining verification capability, resolving the contradiction between reduced data transmission and integrity verification.
Solution Approach 2:
The patent creates a cryptographic copy (hash value) of the original sensor data as trail data. This copy serves as a verification token that can be transmitted separately from the original data. The report receiving apparatus can verify the integrity of processed data by comparing it against this hash copy, enabling verification without transmitting the full original dataset.
2Productivity
If trail data is generated from processed sensor data, then processing efficiency is improved, but the ability to detect tampering is worsened without access to all original data
Solution Approach 1:
The patent applies preliminary action by calculating the hash value (trail data) from the original sensor data before any processing operations are performed. This pre-calculated hash serves as a reference point that remains valid regardless of subsequent processing. When verification is needed, the system can detect any tampering that occurred during processing by comparing the processed data against this pre-established hash, thus maintaining tampering detection accuracy while allowing efficient processing.
Data Source
AI summary
A trail recording system includes a trail recording apparatus and a report receiving apparatus, the trail recording apparatus: holds a plurality of measurement values measured by a sensor, and trail data generated based on at least some of the plurality of measurement values; and transmits the trail data to the report receiving apparatus, the report receiving apparatus transmit, to the trail recording apparatus, a request indicating the trail data of the sensor that is an audit target, the trail recording apparatus transmits, to the report receiving apparatus, out of the plurality of measurement values, measurement values that have been used to generate the indicated trail data, the report receiving apparatus verifies, based on the trail data and the measurement values received from the trail recording apparatus, whether the at least some of the plurality of measurement values measured by the sensor are tampered is verified.