Data Distribution System with Restricted File Piece Segmentation
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Solution Overview
Problem
Existing data distribution systems lack the ability to impose restrictions on the distribution of data files when exchanging file pieces among user terminals, leading to potential unauthorized access or network traffic congestion.
Innovation Solution
A data distribution system that restricts the distribution of specific file pieces based on predetermined conditions, where user terminals can obtain file pieces from other terminals or a distribution device, and the distribution device enforces restrictions on certain pieces, such as before a disclosed date and time, using a system comprising a distribution device, user terminals, and file information managing devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data files are divided into multiple file pieces for peer-to-peer exchange among user terminals, then network traffic concentration is avoided and distribution efficiency is improved, but the ability to impose distribution restrictions on data files is lost
Solution Approach 1:
The data file is divided into multiple file pieces, with at least one designated as a restricted piece. This segmentation allows the system to maintain peer-to-peer distribution efficiency while implementing selective restrictions on specific portions of the data, resolving the contradiction between distribution efficiency and restriction capability.
Solution Approach 2:
Different quality levels are applied to different parts of the data file. The restricted piece has special protection attributes while other pieces have normal distribution attributes. This local differentiation enables targeted control over specific data portions without affecting overall distribution efficiency.
2Reliability
If distribution restrictions are imposed on data files, then data security and authorized access are improved, but network traffic congestion and distribution delays occur
Solution Approach 1:
By segmenting the data file and restricting only specific pieces rather than the entire file, the system minimizes the impact on distribution speed. Users can still efficiently receive unrestricted pieces through peer-to-peer exchange while security restrictions are applied only where necessary.
Solution Approach 2:
Instead of applying restrictions to the entire data file, the system applies restrictions partially to only the necessary restricted pieces. This partial action approach maintains high distribution speed for the majority of data while ensuring security for critical portions.
3Device complexity
If all file pieces are made available for peer-to-peer exchange, then network load on distribution devices is reduced, but unauthorized access and data integrity issues arise
Solution Approach 1:
The data file is segmented into regular pieces and restricted pieces. Regular pieces can be freely exchanged peer-to-peer, reducing distribution device load, while restricted pieces maintain control mechanisms to prevent unauthorized access, thus resolving the contradiction between device load and security.
Solution Approach 2:
Different access controls are applied locally to different file pieces. Restricted pieces have enhanced protection attributes while regular pieces have open access attributes. This local quality differentiation allows the system to reduce overall distribution device complexity while maintaining security against harmful factors.
Data Source
AI summary
There is provided a data distribution system having a distribution device for holding a data file which is a distribution object and a plurality of user terminals, wherein each of the user terminals obtains each of a plurality of file pieces from any of the other user terminals or the distribution device, the plurality of file pieces being obtained by dividing the data file, and the plurality of file pieces obtained are assembled to thereby obtain the data file, at least one predetermined file piece among the plurality of file pieces is a restricted piece for which obtaining from the other user terminals is restricted, and the distribution device restricts distribution of the restricted piece to each of the user terminals, based on a predetermined condition.