Wireless Relay Signal Output Control for Secure Data Transfer
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Solution Overview
Problem
In secure distributed data transfer using a threshold secret sharing scheme, overlapping radio wave coverage areas between wireless relay nodes on different data transfer paths can lead to eavesdropping and decryption of shares, making it challenging to set multiple data transfer paths without compromising security.
Innovation Solution
A control apparatus and system that designates specific wireless relay nodes and sets their wireless signal output values to establish non-overlapping data transfer paths, utilizing location-related information to determine optimal signal output values and relay node selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple data transfer paths are set using wireless relay nodes, then data transfer capability is improved, but security is compromised due to overlapping radio wave coverage areas enabling eavesdropping
Solution Approach 1:
The patent changes the parameter of wireless signal output values assigned to relay nodes. By assigning different signal output values to relay nodes on different data transfer paths, the radio wave coverage areas are differentiated, preventing overlap between paths and thereby eliminating the eavesdropping risk while maintaining multiple path capability for improved data transfer productivity
2Ease of operation
If wireless relay nodes are selected to form data transfer paths, then data transfer paths are established, but radio wave coverage area overlap occurs causing shares to be eavesdropped and decrypted
Solution Approach 1:
The patent applies local quality by assigning specific signal output values to individual relay nodes based on their positions in different data transfer paths. Each relay node receives a customized signal output value that ensures its radio wave coverage area does not overlap with other relay nodes on different paths, thereby preventing eavesdropping while maintaining ease of path establishment through automated control
3Reliability
If adjacent wireless relay nodes are excluded from different data transfer paths, then eavesdropping is prevented, but the number of available data transfer paths is reduced
Solution Approach 1:
The patent resolves this contradiction by changing the signal output value parameter of relay nodes rather than excluding nodes from paths. By assigning appropriate signal output values to relay nodes, the system can include more nodes in data transfer paths while preventing radio wave coverage overlap, thereby increasing the number of available paths without compromising security
Data Source
AI summary
Control apparatus controlling data transfer system including a plurality of wireless relay nodes and a plurality of transmission destination nodes displays, if only one relay node is present as single relay destination in first radio wave coverage area of relay node serving as first relay source, first wireless signal output value and relay node as single relay destination on display. If two or more relay nodes are present as a plurality of relay destinations in first radio wave coverage area, control apparatus displays second wireless signal output value smaller than first wireless signal output value and relay node present in second radio wave coverage area on display. If none of relay nodes are present as relay destination in first radio wave coverage area, control apparatus displays third wireless signal output value larger than first wireless signal output value and relay node present in third radio wave coverage area on display.