Quantum Key Generation with Bidirectional Random Number Exchange
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Solution Overview
Problem
In data transmission systems, particularly quantum key distribution (QKD), significant data loss occurs, leading to inefficient processing due to unbalanced data volumes and increased processing loads between transmission and reception ends.
Innovation Solution
Implementing a pair of transmission systems with opposite directions to balance the processing load by allowing partial data reception in each direction, enabling equalization of data processing between communication devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If quantum key distribution transmits random numbers through quantum channels, then secure key generation is achieved, but significant data loss occurs causing unbalanced processing loads
Solution Approach 1:
The patent introduces reverse QKD where the receiver transmits random numbers back to the transmitter through the same quantum channel. This inversion balances the processing load by ensuring both parties perform equivalent operations - the transmitter processes received random numbers while the receiver processes transmitted random numbers, eliminating the unbalanced processing burden caused by conventional one-way QKD data loss
2Reliability
If conventional QKD transmits data through quantum channels, then quantum security is achieved, but processing load becomes unbalanced between transmission and reception ends
Solution Approach 1:
The patent merges conventional QKD and reverse QKD into a unified system where both transmission and reception ends perform identical processing operations. The transmitter and receiver each process random numbers received from the other party, combining their processing tasks into symmetric operations that balance the overall processing load while maintaining quantum security
Data Source
AI summary
A first device transmits a first random number to a second device through a first quantum channel, and receives a second random number from the second device through a second quantum channel. The first device generates a first encryption key based on the first random number and the second random number. The second device transmits the second random number to the first device through the second quantum channel, and receives the first random number from the first device through the first quantum channel. The second device generates a second encryption key based on the first random number and the second random number.