中文摘要：

量子安全通信作为量子信息的重要分支之一，是量子力学在通信领域极为重要的应用。着重研究B92量子密钥分配协议的量子电路模型及其后续仿真，基于Qcircuit仿真软件设计出一种全新的B92量子密钥分配协议的量子电路模型，通过引入误码率（BER）和协议可靠率r_sec两个指标，仿真分析了在不同噪声信道模型下B92量子密钥分配协议的有效性和安全性。仿真结果表明，这种全新的电路设计实现了B92密钥分配协议的功能，并具有普遍意义，可运用于构造其他密钥分配协议的量子电路模型。

英文摘要：

Quantum communication is one of the most important branches of quantum information, which is the combination of quantum mechanics and information theory. The security of B92 quantum key distri- bution protocol was analyzed in the non-ideal circumstances. A new quantumcircuit model of B92 quantum key distribution protocol was raised to design simulation models under different noise channel models using the QCircuit. Two indicators of BER and r~c were introduced, and then the circuit models were designed to simulate and analyze the effectiveness and security of B92 key distribution protocol under different noise channel models. The experimental results show the new circuit design achieves the purpose of B92 key distribution protocol and the design approach is more universal significant. It can be used to construct more quantum simulation models of different quantum key distribution protocols.