File Timestamp Hash Linking for Low-Overhead Integrity Verification
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Solution Overview
Problem
Existing techniques for acquiring timestamps during file transmission are inefficient and require complex information processing, leading to high resource usage and costs.
Innovation Solution
An information processing system that includes a controller and memory, which generates and links first and second timestamps with hash values to files, allowing for efficient file transmission and tamper detection without complex processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a timestamp token is issued and stored based on received original file, then data integrity can be verified, but information processing complexity and cache memory usage increase
Solution Approach 1:
The patent extracts only the essential elements needed for timestamp verification (hash value and timestamp) from the complete file, storing only these extracted elements in the timestamp token rather than the entire file. This reduces the information processing complexity and cache memory usage while maintaining data integrity verification capability.
Solution Approach 2:
The patent applies local quality by storing the timestamp token with differentiated content based on its purpose: the hash value for verification and the timestamp for timing information. This localized storage approach optimizes cache memory usage by storing only necessary data elements at specific locations rather than uniform data structures.
2Reliability
If complex timestamp verification methods are used, then data security is improved, but information processing cost increases
Solution Approach 1:
The patent replaces complex mechanical verification processes with hash function-based verification. Instead of comparing entire files or using complex cryptographic protocols, the system uses efficient hash value comparison to verify data integrity, significantly reducing information processing time and cost while maintaining security.
Solution Approach 2:
The patent changes the verification parameter from comparing entire files or complex cryptographic signatures to comparing compact hash values. This parameter change maintains security verification capability while dramatically reducing the computational resources and time required for verification operations.
3Reliability
If file transmission is performed without timestamping, then transmission speed is maintained, but data integrity cannot be ensured
Solution Approach 1:
The patent performs preliminary action by generating and storing the timestamp token (including hash value and timestamp) before the actual file transmission occurs. This allows the timestamp verification to be performed independently and in parallel with transmission, minimizing the impact on transmission speed while ensuring data integrity is established in advance.
Data Source
AI summary
An information processing system is provided. This information processing system includes: a controller; and a memory. The controller accepts a transmission request for transmitting a file stored in the memory. The controller acquires a first timestamp based on the file when accepting the transmission request. The first timestamp includes a first hash value which is a random letter string acquired from the file. The controller allows the memory to store the first timestamp to be linked with the file, and transmits the file to a destination that has sent the transmission request.