Data Authenticity Proving System Hash Verification
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Solution Overview
Problem
Existing data authenticity systems cannot effectively prove that data has not been tampered with during storage, as they rely on assumptions rather than verifiable methods, lacking a mechanism to ensure data integrity between data reception and registration.
Innovation Solution
A data authenticity proving system that calculates and compares hash values at different times to verify data integrity, ensuring that only unaltered data is registered in a storage device, using a first authentication value calculator, a second authentication value calculator, a comparator, and a register to store data only when the values match.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data is stored in a server without authentication verification, then storage speed and simplicity are improved, but data authenticity and integrity cannot be guaranteed
Solution Approach 1:
The system calculates authentication values (hash values) of the data at two different timings: before storage (first timing) and after retrieval (second timing). By performing this authentication verification in advance and comparing the values, the system ensures data integrity without compromising storage efficiency. The preliminary calculation of hash values allows for quick verification while maintaining high storage speed.
2Reliability
If authentication verification is performed at multiple timings, then data integrity is improved, but system complexity and processing time increase
Solution Approach 1:
The patent replaces complex physical security mechanisms with cryptographic hash function calculations. Instead of using complicated authentication protocols or hardware security modules, the system uses efficient hash value calculations (e.g., SHA-256) that can be performed rapidly by standard processors. This substitution maintains high data integrity while minimizing system complexity and processing overhead.
Data Source
AI summary
A data authenticity proving system calculates a hash value A and a hash value B from an evidence data transmitted from a terminal device at respectively different timings, and, when the hash value A and the hash value B are the same, registers the evidence data by storing the evidence data in a storage device. In case that the evidence data has been tampered with during a time between a timing of receiving the evidence data from the terminal device and a timing of registering the evidence data in the storage device, the hash value A and the hash value B take respectively different values, thereby registration of the evidence data will not be performed.