High-speed optical secure communication with an external noise source and an internal time-delayed feedback loop

We propose and experimentally demonstrate a novel physical layer encryption scheme for high-speed optical communication. A 10 Gb/s on-off keying signal is secretly transmitted over 100 km standard single-mode fiber. The intensity-modulated message is secured by the encryption mechanism, which is composed of an external noise source and an internal time-delayed feedback loop. The external noise serves as an entropy source with sufficient randomness. The feedback loop structure in the transmitter introduces a time-domain encryption key space, and a corresponding open-loop configuration at the receiver side is used for synchronization and decryption. Experiment results show the effectiveness of the proposed scheme. For a legitimate terminal, bit error rate below 10−8 can be obtained. Decryption degradations with the mismatch of different hardware parameters are researched. The time delay in the feedback loop provides a sensitive encryption key. For other hardware parameters, the system is robust enough for synchronization. Meanwhile, the time-delay signature of the loop is able to be well concealed by the external noise. Moreover, the proposed scheme can support density wavelength division multiplexing transmission with a relatively simple structure. This work also provides a new concept to establish optical secure communication by combining a time-delayed feedback chaotic system and random noise.

[1]  Weisheng Hu,et al.  Phase chaos generation and security enhancement by introducing fine-controllable dispersion , 2018 .

[2]  Paul R. Prucnal,et al.  Phase-mask covered optical steganography based on amplified spontaneous emission noise , 2013, 2013 IEEE Photonics Conference.

[3]  Kun Qiu,et al.  Security-enhanced chaos communication with time-delay signature suppression and phase encryption. , 2016, Optics letters.

[4]  D M Wang,et al.  Key space enhancement of optical chaos secure communication: chirped FBG feedback semiconductor laser. , 2019, Optics express.

[5]  Hongxi Yin,et al.  Performance analysis of dense wavelength division multiplexing secure communications with multiple chaotic optical channels , 2012 .

[6]  Paul R Prucnal,et al.  Analog noise protected optical encryption with two-dimensional key space. , 2014, Optics express.

[7]  Wei Pan,et al.  Time-delay concealment and complexity enhancement of an external-cavity laser through optical injection. , 2015, Optics letters.

[8]  Lingfeng Liu,et al.  Time-Delay Concealment in a Three-Dimensional Electro-Optic Chaos System , 2015, IEEE Photonics Technology Letters.

[9]  Yuncai Wang,et al.  Time delay signature elimination of chaos in a semiconductor laser by dispersive feedback from a chirped FBG. , 2017, Optics express.

[10]  Yuechun Shi,et al.  Confidentiality-enhanced chaotic optical communication system with variable RF amplifier gain. , 2019, Optics express.

[11]  Romain Modeste Nguimdo,et al.  Digital key for chaos communication performing time delay concealment. , 2011, Physical review letters.

[12]  Paul R. Prucnal,et al.  Dispersion Deployment and Compensation for Optical Steganography Based on Noise , 2016, IEEE Photonics Technology Letters.

[13]  Alexandre Locquet,et al.  Time delay identification in chaotic cryptosystems ruled by delay-differential equations , 2005 .

[14]  Paul R. Prucnal,et al.  Long range secure key distribution over multiple amplified fiber spans based on environmental instabilities , 2016, 2016 Conference on Lasers and Electro-Optics (CLEO).

[15]  D. Rontani,et al.  Enhanced complexity of optical chaos in a laser diode with phase-conjugate feedback. , 2016, Optics letters.

[16]  Fares S Almehmadi,et al.  Secure chaotic transmission of electrocardiography signals with acousto-optic modulation under profiled beam propagation. , 2015, Applied optics.

[17]  Anbang Wang,et al.  Optical Heterodyne Generation of High-Dimensional and Broadband White Chaos , 2015, IEEE Journal of Selected Topics in Quantum Electronics.

[18]  Kun Qiu,et al.  Generation of flat wideband chaos with suppressed time delay signature by using optical time lens. , 2017, Optics express.

[19]  M. Peil,et al.  Electro-optic delay oscillator with nonlocal nonlinearity: Optical phase dynamics, chaos, and synchronization. , 2009, Physical review. E, Statistical, nonlinear, and soft matter physics.

[20]  Fan-Yi Lin,et al.  Chaos time delay signature suppression and bandwidth enhancement by electrical heterodyning. , 2015, Optics express.

[21]  W. Pan,et al.  Experimental Evidence of Time-Delay Concealment in a DFB Laser With Dual-Chaotic Optical Injections , 2016, IEEE Photonics Technology Letters.

[22]  Qiliang Li,et al.  Numerical investigations of synchronization and communication based on an electro-optic phase chaos system with concealment of time delay. , 2019, Applied optics.

[23]  Eckehard Olbrich,et al.  Coarse grained dynamical entropies: Investigation of high-entropic dynamical systems , 2000 .

[24]  Laurent Larger,et al.  Chaos-based communications at high bit rates using commercial fibre-optic links , 2005, Nature.

[25]  Ken Tanizawa,et al.  Digital Coherent 20-Gbit/s DP-PSK Y-00 Quantum Stream Cipher Transmission over 800-km SSMF , 2019, 2019 Optical Fiber Communications Conference and Exhibition (OFC).

[26]  Ming Tang,et al.  Secure Optical Communication System Based on ASE Noise with No Need for Key Distribution , 2018, 2018 10th International Conference on Advanced Infocomm Technology (ICAIT).

[27]  Mengfan Cheng,et al.  Enhanced secure strategy for electro-optic chaotic systems with delayed dynamics by using fractional Fourier transformation. , 2014, Optics express.

[28]  Monish Ranjan Chatterjee,et al.  Image intensity recovery with mitigation in the presence of gamma–gamma atmospheric turbulence using encrypted chaos , 2019, Optical Engineering.

[29]  Pu Li,et al.  Observation of flat chaos generation using an optical feedback multi-mode laser with a band-pass filter. , 2019, Optics express.

[30]  Ming Tang,et al.  Security-Enhanced OFDM-PON Using Hybrid Chaotic System , 2015, IEEE Photonics Technology Letters.

[31]  Hongxiang Wang,et al.  Security-Enhanced Electro-Optic Feedback Phase Chaotic System Based on Nonlinear Coupling of Two Delayed Interfering Branches , 2018, IEEE Photonics Journal.

[32]  Paul R Prucnal,et al.  Temporal phase mask encrypted optical steganography carried by amplified spontaneous emission noise. , 2014, Optics express.

[33]  L. Larger,et al.  Nonlocal Nonlinear Electro-Optic Phase Dynamics Demonstrating 10 Gb/s Chaos Communications , 2010, IEEE Journal of Quantum Electronics.

[34]  Paul R. Prucnal,et al.  Secure Communication in Fiber-Optic Networks , 2014 .

[35]  Jianping Yao,et al.  Broadband Chaotic Signals and Breather Oscillations in an Optoelectronic Oscillator Incorporating a Microwave Photonic Filter , 2014, Journal of Lightwave Technology.

[36]  Zheng-Mao Wu,et al.  Evolution of time delay signature of chaos generated in a mutually delay-coupled semiconductor lasers system. , 2012, Optics express.

[37]  J. Zhang,et al.  Wideband Complexity-Enhanced Optical Chaos Generation and Its Application for Fast Random Bit Generation , 2018, 2018 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR).

[38]  K. Qiu,et al.  Time delay signature suppression and complexity enhancement of chaos in laser with self-phase-modulated optical feedback , 2017, 2017 Conference on Lasers and Electro-Optics (CLEO).

[39]  Fei Jiang,et al.  Research on optical security based on simulated noise induced encryption scheme , 2019, Journal of Physics: Conference Series.

[40]  X. Zou,et al.  Analytical Models for Phase-Modulation-Based Microwave Photonic Systems With Phase Modulation to Intensity Modulation Conversion Using a Dispersive Device , 2009, Journal of Lightwave Technology.

[41]  Monish Ranjan Chatterjee,et al.  Improved performance of analog and digital acousto-optic modulation with feedback under profiled beam propagation for secure communication using chaos , 2014 .

[42]  Fares S. Almehmadi,et al.  Secure free-space communication, turbulence mitigation, and other applications using acousto-optic chaos. , 2018, Applied optics.

[43]  Jing Wang,et al.  Secure WDM-PON based on chaos synchronization and subcarrier modulation multiplexing , 2016 .

[44]  Zheng-Mao Wu,et al.  Time-delay signature concealment of chaotic output in a vertical-cavity surface-emitting laser with double variable-polarization optical feedback , 2013 .

[45]  Weisheng Hu,et al.  Chaotic optical communications over 100-km fiber transmission at 30-Gb/s bit rate. , 2018, Optics letters.

[46]  Romain Modeste Nguimdo,et al.  Electro-optic phase chaos systems with an internal variable and a digital key. , 2012, Optics express.

[47]  Zeev Zalevsky,et al.  Photonic-layer encryption and steganography over IM/DD communication system. , 2018, Optics express.

[48]  X. Bao,et al.  Time-delay signature concealed broadband gain-coupled chaotic laser with fiber random grating induced distributed feedback , 2018, Optics & Laser Technology.

[49]  T T Hou,et al.  Maximizing the security of chaotic optical communications. , 2016, Optics express.

[50]  Laurent Larger,et al.  Cracking chaos-based encryption systems ruled by nonlinear time delay differential equations , 2003 .

[51]  Kun Qiu,et al.  Physical secure optical communication based on private chaotic spectral phase encryption/decryption. , 2019, Optics letters.