Channel-Based Dynamic Key Generation for Physical Layer Security in OFDM-PON Systems

作者：Yating Wu, Yu Yan, Yuanfeng Hu, Yanzan Sun, Tao Wang, Qianwu Zhang · 发表于：IEEE photonics journal · 年份：2021 · DOI：10.1109/jphot.2021.3056053 · 被引用次数：25 · 研究领域：Optical Network Technologies、Advanced Photonic Communication Systems、Chaos-based Image/Signal Encryption

Key generation and distribution is a fundamental problem of communication security. To avoid the potential risk due to static key, a physical-layer dynamic key generation and encryption scheme is proposed for orthogonal frequency division multiplexing passive optical network (OFDM-PON) systems. By exploiting the inherent channel randomness, the shared secret key between the OLT and ONU is generated and renewed periodically, thereby effectively improving the security against malicious attacks. The transmission experiment of 3.5 Gb/s 16-quardrature-amplitued-modulatin encrypted OFDM data is successfully demonstrated over a 25 km standard single-mode fiber. The key space of the proposed encryption scheme reaches 1066, which provides privacy between users and protection against eavesdropping.