相移键控量子噪声随机加密系统性能研究

来源 :量子电子学报 | 被引量 : 0次 | 上传用户:guyehanxing
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量子噪声随机加密(QNRC)是一种新兴的提高光纤传输安全性的物理层加密方案.基于窃听信道模型,以合法信道容量和信息截获概率为基本指标,对相移键控(PSK)QNRC系统的传输性能和安全性能进行定量评估,并分析了介观态功率、进制数以及量子噪声掩盖的量子态数对系统性能的影响.仿真结果表明:为了提高系统的传输性能和安全性能,发送端需采用光放大器;在保证系统传输性能的同时,可适当减小介观态功率来提高系统的安全性;较高的进制数可有效地提高PSK-QNRC系统的安全性,且不影响其传输性能;系统数据安全性主要受限于量子噪声掩盖的量子态数.
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