High-Speed Quantum Noise Stream Cipher System Enabled by Optical Fiber-based Encryption and Low-Complexity Digital Decryption

Abstract

We propose secure digital-coherent system utilizing high-speed encryption/decryption through fiber and simplified digital back propagation (DBP). Negligible penalty is observed by detecting 64-Gbaud 216-level PSK-like chipper signals through a 5-stage DBP with precise fiber parameters.