量子噪声随机加密(QNRC)是一种结合了量子力学原理和经典流密码思想的信息抗截获通信方法。为了对相位调制(PSK)QNRC系统的特性进行仿真验证,利用VPI仿真软件搭建了一套基于商用组件的仿真系统。基于任意波形发生器生成密文电信号及密钥电信号,并在接收端利用相位调制器及差分相移键控(DPSK)接收机从多进制密文信号中恢复二进制信号,最终实现了密文进制数为256,数据传输速率为2.5 Gbit/s,传输距离为500 km的无误码传输。与强度调制(ISK)方案相比,PSK方案避免了解调时收、发双方功率必须匹配的问题。进制数的增加不会劣化PSK方案的传输性能,有助于提高系统安全性,PSK方案具有潜在的安全性优势。

Quantum-noise randomized cipher (QNRC) is an information anti-interception communication method that combines the principles of quantum mechanics with classical stream cipher. In this study, the characteristics of a phase-shift keying (PSK) QNRC system are simulated and verified through a simulation system based on commercial components using VPI simulation software. In particular, the ciphertext electrical signals and the key electrical signals are generated based on an arbitrary waveform generator. At the receiving end, the binary signal is recovered from the multilevel ciphertext signal using a phase modulator and a differential phase-shift keying (DPSK) receiver. Finally, error-free communication is achieved at a data transmission rate and transmission distance of 2.5 Gbit/s and 500 km, respectively, in which the mechanism of the ciphertext is 256. This PSK scheme overcomes the problem of the intensity-shift keying (ISK) scheme, in which the powers of the transmitter and receiver must be matched during demodulation. The increase of mechanisms does not degrade the transmission performance of the PSK scheme and will help improve system security. Thus, the PSK scheme has potential security advantages.