Model and method for user authentication for quantum key distribution network

Abstract

The invention provides a model and a method for user authentication based on a trusted center in a quantum key distribution network, specifically, a user authentication model based on the trusted center is provided and an implementation method is described in detail, in order to realize the communication security between any two users in the network and prevent a man-in-the-middle attack. Based on the model, the invention further provides a method for user authentication, which comprises the following steps that: 1, any user requesting for communication in the network sends a connection request to the trusted center; 2, the trusted center sends a pre-shared key to the two communication parties respectively; 3, the two communication parties set up a quantum channel and are authenticated; and 4, the two parties are authenticated regularly or irregularly in the subsequent communication process. According to the invention, by fully considering the development status of the current quantum key distribution network and by combining with the actual requirement, a quantum communication channel can be set up securely between any two nodes in the network, so that the communication security between users can be realized.

Description

technical field [0001] The invention belongs to the field of quantum key distribution, and is a user authentication model and method designed for realizing the security of keys in a quantum key distribution network. Background technique [0002] Quantum key distribution is the use of quantum channels to transmit qubits (single photons or weak light signals); it provides an absolutely secure random sequence for both legal communication parties, and the security of quantum keys has been proved to be absolutely safe in theory. This is determined by the following fundamental laws of quantum mechanics. The first is Heisenberg's certainty principle, also known as the uncertainty principle, that is, two asymmetric physical quantities cannot be accurately measured at the same time. The second is the principle of measurement collapse, that is, the measurement of a quantum state will inevitably collapse the quantum state to an eigenstate. The third is the quantum non-cloning theorem...

AI Technical Summary

Problems solved by technology

The third is the quantum non-cloning theorem, that is, an unknown quantum state cannot be accurately cloned

Most of the existing research programs are based on entangled particles for user verification. Due to various reasons such as limited experimental conditions, there are still great difficulties in the realization of entangled states.

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