Quantum key scheduling method for cloud computing platform

Abstract

A quantum key scheduling method oriented to a cloud computing platform comprises the steps that an operation environment is established, and the operation environment comprises a key pool KP, an application registration component AR, a key message processing component KM and a key distribution component KD. Compared with the prior art, the method solves the problem of matching with an over-low key generation rate of a quantum key distribution system under the condition of relatively high key consumption of a security application of a cloud computing platform. By using the key pool, continuous work of the quantum key distribution process is realized, and the problem that precious quantum key resources are wasted due to the fact that the key pool is not used in time is solved. By using the security application hierarchical design, the problem that the low-level security application and the high-level security application compete for the key when the quantum key supply is insufficient is solved. By using a Lyapunov optimization algorithm in a key distribution process, fair distribution of quantum keys between security applications of the same level is realized, and limited quantum key resources are ensured to be utilized to the maximum extent.

Description

technical field [0001] The invention relates to the technical fields of quantum communication and cloud computing, in particular to a quantum key scheduling method for a cloud computing platform. Background technique [0002] Quantum key refers to the symmetric key negotiated by Quantum Key Distribution (QKD) technology, and Quantum Key Distribution (QKD) technology is based on the uncertainty and indivisibility in quantum mechanics. , non-cloning principle, using key distribution protocols such as BB84, B92 and EPR to ensure the security of key distribution in the network. In recent years, due to the high security characteristics of QKD technology, the quantum key distribution platform based on QKD technology has been used It has been widely used in fields with high security requirements such as government affairs, finance, and energy. [0003] However, in practical applications, the working efficiency of quantum key distribution equipment is limited by many factors such a...

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Problems solved by technology

[0004] Although in some implementation schemes, such as the centralized scheduling key relay scheme adopted by the CCSA ST7 working group, the overall key generation rate of the system can be improved to a certain extent. The rate is the sum of the key generation rate of the whole network quantum key distribution link, but taking a 10-node quantum key distribution network as an example, if the average key generation rate of the link is 20KPBs, the key generation rate is only 200KPBs If you want to further increase the key generation rate, you can only continue to add redundant links. However, due to the high cost of QKD network deployment, adding links will further increase the cost of the entire system, and the key generation rate of about 200KPBs , for cloud computing security applications with high throughput requirements, it is far from satisfying key consumption

[0005] Another solution is to establish a key pool. The key pool avoids the waste of valuable quantum key resources by caching quantum keys that are not consumed in time, so that the QKD network can continue to negotiate quantum keys. Although the increase in key storage brings security risk, but it can alleviate the problem of low quantum key generation rate to a certain extent

However, the problem with this solution is that as long as the overall key consumption speed of the system is higher than the key generation speed of the QKD network, it still faces the state of lack of quantum key supply

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