Quantum Key Buffer Control for Shared Optical Channel Encryption
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Solution Overview
Problem
Current quantum communication methods face challenges with limited key generation rates, leading to inefficient encryption and increased costs due to redundant infrastructure and noise interference, which degrade the bit error ratio and key generation rate.
Innovation Solution
A method and apparatus that dynamically adjust quantum key generation rate, encryption technique, and bandwidth based on the fill level of a key buffer and available optical channel bandwidth, ensuring optimal transmission of bandwidth and jitter critical data by optimizing the use of shared optical resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If quantum communication and classical communication share an optical channel, then infrastructure cost is reduced, but noise and interference increase which degrades bit error ratio and key generation rate
Solution Approach 1:
The system dynamically adjusts the quantum key generation rate based on real-time channel conditions and classical communication bandwidth requirements. The controller monitors the fill level of the key buffer and modulates the QKD rate accordingly, allowing the system to adapt to varying traffic conditions and maintain optimal performance without fixed infrastructure allocation
Solution Approach 2:
The invention changes the operating parameters of the QKD system by adjusting the key generation rate according to the fill level of the key buffer and available optical channel bandwidth. This dynamic parameter adjustment allows the system to optimize the balance between key generation capacity and classical communication bandwidth utilization, reducing infrastructure redundancy while maintaining reliability
2Productivity
If key buffer fill level is low, then more optical bandwidth can be allocated to classical communication, but encryption security and transmission quality deteriorate
Solution Approach 1:
The system implements a feedback mechanism where the controller continuously monitors the fill level of the key buffer and adjusts the quantum key generation rate accordingly. When the key buffer fill level is low, the system increases the QKD rate to replenish keys, ensuring that encryption security is maintained while still allowing adequate classical communication bandwidth
Solution Approach 2:
The quantum key generation rate is made dynamic rather than fixed, allowing the system to adjust key generation capacity based on real-time key buffer status. This dynamic adjustment ensures that security requirements are met while optimizing classical communication bandwidth utilization according to actual operational conditions
3Quantity of substance
If quantum key generation rate is increased, then more keys are available for encryption, but optical channel bandwidth for classical communication decreases
Solution Approach 1:
The system dynamically balances the allocation of optical channel bandwidth between quantum key generation and classical communication based on real-time conditions. The controller adjusts the QKD rate according to the key buffer fill level and available bandwidth, creating a dynamic equilibrium that optimizes both key availability and classical communication capacity rather than fixing one parameter
Solution Approach 2:
The invention changes the key generation rate parameter dynamically based on the fill level of the key buffer and available optical bandwidth. This parameter adjustment allows the system to optimize the trade-off between key availability for encryption and classical communication bandwidth, ensuring both requirements are met according to actual operational needs
Data Source
AI summary
A method (100) of quantum communication, the method comprising steps of: receiving (102) data for encrypted transmission on an optical channel; determining (104) a fill level of a key buffer storing shared secret key bits distributed by a quantum key distribution, QKD, system via the optical channel; determining (106) a bandwidth and an encryption technique for encrypted transmission of the data dependent on the determined fill level; encrypting (108) the data using the determined encryption technique; transmitting (110) the encrypted data at the determined bandwidth on the optical channel; determining (112) a quantum key generation rate required to support ongoing encrypted transmission of data on the optical channel at the determined bandwidth and encryption technique; and configuring (114) the QKD system to perform quantum key generation at the determined quantum key generation rate. Quantum communication apparatus configured to implement the method.