Physical-layer security of optical communication based on chaotic optical encryption without an additional driving signal

Abstract

We propose and numerically demonstrate a scheme for physical-layer security based on chaotic phase encryption, where the transmitted carrier signal is used as the common injection for chaos synchronization, so there is no need for additional common driving. To ensure privacy, two identical optical scramblers consisting of a semiconductor laser and a dispersion component are used to observe the carrier signal. The results show that the responses of the optical scramblers are highly synchronized but are not synchronized with the injection. By properly setting the phase encryption index, the original message can be well encrypted and decrypted. Moreover, the legal decryption performance is sensitive to the parameter mismatch, since it can degrade the synchronization quality. A slight drop in synchronization induces an evident deterioration in decryption performance. Therefore, without perfectly reconstructing the optical scrambler, the original message cannot be decoded by an eavesdropper.

Study of dynamics in a NH3 laser using Zeghlach-Mandel model

“…Due to the inherent broadband, noise-like and unpredictable characteristics of signal of a chaotic laser, the difficulty of optoelectronic reconnaissance is greatly increased, and it is an important technical means for optical information confidentiality and optic measuring devices [4][5][6][7][8][9][10][11] . In the fields of optical communication and optic measuring devices, the breakthrough of optical chaos secure communication technology and optic measuring devices can be said to be a revolution in secure communication and precision optics measuring devices, which will certainly have a revolutionary impact on secure communication and precision optics measuring devices, especially in military secure communication military optics.…”

“…In the fields of optical communication and optic measuring devices, the breakthrough of optical chaos secure communication technology and optic measuring devices can be said to be a revolution in secure communication and precision optics measuring devices, which will certainly have a revolutionary impact on secure communication and precision optics measuring devices, especially in military secure communication military optics. The chaotic laser gives an important value to study laser systems, chaotic optics emitters, random optics signal generators, precision measuring devices, and encoding communications [4][5][6][7][8][9][10][11] .…”

Study of dual‐hyperchaos synchronization between an erbium‐doped fiber three‐ring laser and an erbium‐doped fiber dual‐ring laser, and their applications to dual‐channel encoding

“…Introduction: Chaotic signals characterize randomness, unpredictability, and a white noise spectrum [1][2][3]. And chaotic laser synchronizations are widely applied to optic secure communications [4][5][6][7]. The researchers presented "open-loop" and "drive-response" chaos laser synchronization encoding scheme [4][5][6][7].…”

“…And chaotic laser synchronizations are widely applied to optic secure communications [4][5][6][7]. The researchers presented "open-loop" and "drive-response" chaos laser synchronization encoding scheme [4][5][6][7]. To enhance communication security, people presented phase encoding and optoelectronic encoding approaches [4][5][6][7].…”

“…The researchers presented "open-loop" and "drive-response" chaos laser synchronization encoding scheme [4][5][6][7]. To enhance communication security, people presented phase encoding and optoelectronic encoding approaches [4][5][6][7]. Hyperchaos (HC) has also attracted researchers' interest since HC carriers can enhance the security of chaotic communications because the emitters used have two or more positive Lyapunov exponents (LEs) [2].…”