Secret Sharing Storage for Small-File Compression and Fragment Distribution

Solution Overview

Problem

In secret sharing storage systems, storing small-capacity files results in surplus sectors due to fragment files being smaller than sector size, leading to increased disk usage.

Innovation Solution

Compress multiple files into one file at a predetermined compression rate before uploading to a secret sharing storage, then divide and distribute the compressed file into fragment files across multiple servers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If small-capacity files are stored directly in secret sharing storage, then data security is maintained, but disk usage increases due to surplus sectors

Engineering Contradiction:

Improvedata securityVSAvoiddisk usage

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The system performs preliminary compression on multiple small files before they are uploaded to the secret sharing storage. By compressing files in advance on the client side, the system reduces the total data volume that needs to be fragmented and stored, thereby minimizing the surplus sector problem while maintaining data security through subsequent secret sharing encryption

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system merges multiple small-capacity files into a single compressed file before storage. This consolidation approach allows the data to be fragmented into fewer, larger fragment files that better utilize disk sectors, reducing the surplus space wasted when fragment files are smaller than sector size

Inventive Principle:

Principle #5Merging (Combining)

2Manufacturing precision

If multiple small files are uploaded individually to secret sharing storage, then file integrity is maintained, but storage efficiency decreases due to sector surplus

Engineering Contradiction:

Improvefile integrityVSAvoidstorage efficiency

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The system performs preliminary compression on multiple small files before they are uploaded to the secret sharing storage. By compressing files in advance on the client side, the system reduces the total data volume that needs to be fragmented and stored, thereby minimizing the surplus sector problem while maintaining data security through subsequent secret sharing encryption

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system merges multiple small-capacity files into a single compressed file before storage. This consolidation approach allows the data to be fragmented into fewer, larger fragment files that better utilize disk sectors, reducing the surplus space wasted when fragment files are smaller than sector size

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20260058938A1Processing system, processing method, and processing program

Publication Date: 2026.02.26 NTT DOCOMO BUSINESS INC

AI summary

A processing system includes: a client that uploads a file to be stored; and a secret sharing storage that stores fragment files obtained by dividing the uploaded file in a distributed manner across a plurality of storage servers, in which the client includes a backup unit that compresses a plurality of files to be stored into one file at a predetermined compression rate and then uploads the compressed file, and the secret sharing storage includes: the plurality of storage servers; and a distribution server that encrypts the compressed file, and then divides the compressed file into fragment files and stores the fragment files in a distributed manner across the plurality of storage servers.