Quantum Key Data Sharing With Selective Segment Encryption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing secret data communication systems using quantum key distribution consume a large number of encryption keys due to encrypting all divided data, leading to inefficiency and potential key exhaustion.
Innovation Solution
A system that selectively encrypts a minimum number of divided data segments using quantum key distribution, ensuring security by encrypting data in transmission sections based on a (k, n)-threshold-type secret distribution method, where k is the minimum number of segments required for data restoration and n is the total number of divisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all divided data is encrypted using quantum key distribution, then data security is ensured, but encryption key consumption increases significantly
Solution Approach 1:
The patent segments the encryption process by dividing data into multiple pieces and selectively encrypting only certain segments (specifically, only encrypting when the number of unencrypted pieces is less than the threshold k). This segmentation approach maintains security by ensuring that encrypted segments provide sufficient protection while reducing overall key consumption compared to encrypting all segments.
Solution Approach 2:
The patent applies partial action by encrypting only a portion of the divided data segments rather than all segments. Specifically, encryption is performed selectively based on the count of unencrypted segments, applying encryption only when necessary to maintain security thresholds, thereby reducing encryption key consumption while preserving data security.
2Loss of substance
If the number of encryption targets is reduced to minimize key consumption, then encryption key efficiency improves, but data security may be compromised
Solution Approach 1:
The patent implements feedback control by continuously monitoring the number of unencrypted data pieces and dynamically adjusting the encryption decision. The counter tracking unencrypted segments provides feedback that determines whether encryption should be applied, ensuring that security thresholds are maintained while optimizing key usage based on real-time system state.
Solution Approach 2:
The patent changes the parameter of encryption application from a fixed approach (encrypting all or none) to a dynamic approach based on the threshold parameter k. By adjusting encryption decisions based on the number of unencrypted segments relative to the threshold, the system optimizes the balance between security and key consumption efficiency.
Data Source
AI summary
A secret data communications system includes at least one memory storing commands and at least one processor executing the commands. The at least one processor executes the commands to select the transmission sections of the number of encryption targets for encrypted communication from among the transmission sections of the number of divisions relevant to each of the divided data divided from the predetermined data by secret distribution processing, and causes each of a pair of communication apparatuses at both ends of the selected transmission section to perform communication in which the divided data relevant to the selected transmission section is encrypted using the encryption key shared between the pair of communication apparatuses based on the quantum key distribution. The number of encryption targets is equal to or more than the minimum number of pieces of divided data for restoration to predetermined data and less than the number of divisions.