Physical layer key distribution method based on random beams and edge calculation

Abstract

The invention discloses a physical layer key distribution method based on random beams and edge calculation. The method comprises the following steps of S1, setting a protection area, S2, conducting channel estimation: enabling Bob to send a channel estimation sequence to Alice, enabling Alice to estimate uplink channel information according to the received information, and transposing the uplinkchannel information to obtain downlink channel information, S3, generating random beams: enabling Alice to generate random beams according to the downlink channel information, S4, processing and sending a key symbol: enabling Alice to send a key symbol s(n) to Bob, S5, receiving signals: enabling Bob and Eve to receive signals sent by Alice, S6, conducting key estimation: enabling Bob to estimatethe key symbol under the condition of neglecting a white noise vector nA to obtain estimated key information, and S7, when n is equal to 1, 2,... L, repeatedly executing the steps S3 to S6 until the Bob obtains the key with L symbol lengths. The distribution of the physical layer key can be realized through two times of communication interaction, and the time delay and complexity caused by key sharing are reduced.

Description

technical field [0001] The present invention relates to key sharing, in particular to a physical layer key distribution method based on random beams and edge computing. Background technique [0002] With the rapid development of 5G Internet of Things and edge computing networks, various confidential and sensitive data in the network are increasing massively, and the ensuing information security issues are becoming more and more prominent, and security is gradually becoming an important aspect of edge computing. Preconditions for different business applications. Edge computing nodes, as small data centers and micro-cloud centers, are managed and controlled reasonably. In traditional wireless networks, cryptography-based encryption techniques are usually used at the network layer and upper layers to ensure system communication security. To carry out various encrypted authentications, a secure shared key needs to be established between the communication parties. However, in ...

AI Technical Summary

Problems solved by technology

Since the two parties need to perform at least three interactions on the public channel during the process of establishing the key (including the sending and receiving parties sending pilots to each other, key negotiation, privacy amplification and final consistency confirmation, etc.), the complexity of the communication protocol Higher, the risk of information leakage increases

And because the normal communication process and key distribution cannot be carried out at the same time, resulting in communication interruption or increased delay

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