A quantum key scheduling method for cloud computing platform

Abstract

A quantum key scheduling method oriented to a cloud computing platform, comprising establishing an operating environment, the operating environment comprising 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 invention solves the matching problem of the quantum key distribution system's low key generation rate under the condition of high key consumption of cloud computing platform security applications. By using the key pool, the continuous work of the quantum key distribution process is realized, and the problem of wasting precious quantum key resources caused by not being used in time is solved. By using the security application hierarchical design, it solves the problem of competing for keys between low-level security applications and high-level security when the quantum key supply is insufficient. By using the Lyapunov optimization algorithm in the key distribution process, the fair distribution of quantum keys among security applications at the same level is realized, ensuring maximum utilization of limited quantum key resources.

Description

technical field [0001] The present invention relates to the technical field of quantum communication and cloud computing, in particular to a quantum key scheduling method oriented to a cloud computing platform. Background technique [0002] Quantum key refers to the symmetric key negotiated through quantum key distribution (Quantum Key Distribution, QKD) technology, and quantum key distribution (Quantum Key Distribution, QKD) technology is based on the uncertainty and indivisible in quantum mechanics , The principle of non-cloning, 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 features of QKD technology, quantum key distribution platforms based on QKD technology have It has been widely used in fields with high security demands, such as government affairs, finance, and energy. [0003] However, in practical applications, the work efficiency of quantum key distrib...

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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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