激光与光电子学进展, 2020, 57 (17): 170609, 网络出版: 2020-09-01
正交相移键控量子噪声随机加密系统的安全性研究 下载: 963次
Analysis on Security of Quadrature Phase Shift Keying Quantum-Noise Randomized Cipher System
光通信 正交相移键控 相移键控 保密容量 物理层安全 optical communications quadrature phase shift keying phase shift keying secrecy capacity physical layer security
摘要
以保密容量为评价指标,定量分析了正交相移键控(QPSK)量子噪声随机加密(QNRC)系统的物理层安全性。分别建立了密钥和数据窃听信道模型,推导了密钥保密容量及数据保密容量的表达式,并得到了系统的最大可达安全速率。评估了关键系统参数(进制数、内部光放大器增益、介观相干态功率)对QPSK-QNRC系统密钥及数据安全性的影响,并在同一框架下与相移键控(PSK)-QNRC系统进行了比较。结果表明,关键系统参数对两个系统安全性的影响规律一致,相比PSK-QNRC系统,QPSK-QNRC系统的密钥安全性和最大可达安全速率较高,数据安全性略低,且介观功率水平较强。同时发现,PSK-QNRC系统的最大可达安全速率主要受限于密钥的安全性,而QPSK-QNRC系统的最大可达安全速率主要受限于数据的安全性。
Abstract
In this paper, the physical layer security of quantum-noise randomized cipher (QNRC) system based on quadrature phase shift keying (QPSK) is analyzed quantitatively with the secrecy capacity as the evaluation index. The key and data eavesdropping channel models are established, respectively. The expressions of key system and data secrecy capacity are derived, and the maximum security rate of the system is obtained. The effects of key parameters (scale number, internal optical amplifier gain and mesoscopic coherent state power) on the key and data security of QPSK-QNRC system are evaluated and compared with phase shift keying (PSK)-QNRC system in the same frame. The results show that the key system parameters have the same effect on the security of the two systems. Compared with the PSK-QNRC system, the QPSK-QNRC system has higher key security and maximum achievable security rate, lower data security, and stronger mesoscopic power level. At the same time, the maximum achievable security rate of the PSK-QNRC system is mainly limited by the security of key, while the maximum achievable security rate of the QPSK-QNRC system is mainly limited by the security of data.
陈毓锴, 郑吉林, 焦海松, 蒲涛, 曹阳. 正交相移键控量子噪声随机加密系统的安全性研究[J]. 激光与光电子学进展, 2020, 57(17): 170609. Yukai Chen, Jilin Zheng, Haisong Jiao, Tao Pu, Yang Cao. Analysis on Security of Quadrature Phase Shift Keying Quantum-Noise Randomized Cipher System[J]. Laser & Optoelectronics Progress, 2020, 57(17): 170609.