Physical secure optical communication based on private chaotic spectral phase encryption/decryption

Abstract

We propose and demonstrate a novel physical secure high-speed optical communication scheme based on synchronous chaotic spectral phase encryption (CSPE) and decryption (CSPD). The CSPE is performed by a module composed of two dispersion components and one phase modulator (PM) between them, and the CSPD is carried out by a twin module with reverse dispersions and inverse PM driving signals. The PM driving signals of the CSPE and CSPD modules are privately-synchronized chaotic signals that are independently generated by local external-cavity semiconductor lasers subject to common injection. The numerical results indicate that with the CSPE, the original message can be encrypted as a noiselike signal, and the timing clock of original message is efficiently hidden in the encrypted signal. Based on the private synchronization of the chaotic PM driving signals, only the legal receiver can decrypt the message correctly, while the eavesdropper is not able to intercept useful message. Moreover, the proposed scheme can also support secure symmetric bidirectional high-speed WDM transmissions. This work shows a prospective way to implement high-speed secure optical communications at physical layer.

Wideband Millimeter-Wave Flat Chaos Generation With Controllable Power Spectrum Using Optical Time Lens

“…Owing to the considerable importance of optical chaos demonstrated in communication systems such as physical random bit generation [1-3], chaotic radars [4], secure-communications [5][6][7], optical time-domain reflectometer (OTDR) [8], optical neuron [9], Brillouin optical correlation-domain analysis (BOCDA) [10], optical chaos generation process has recently attracted very great research attention. Basically, the optical feedback into semiconductor laser used to produce chaotic signal was mainly limited in application performances due to the monopolization of chaos RF spectrum by the laser relaxation oscillation frequency [11] and time-delay signature (TDS) [12].…”

Secure 100 Gb/s IMDD Transmission Over 100 km SSMF Enabled by Quantum Noise Stream Cipher and Sparse RLS-Volterra Equalizer

“…However, these schemes are limited by the processing speed of electronics [6], [7], and the MAC layer of an optical network is more susceptible to malicious attacks [5]. Therefore, researchers have turned their attention to the security of the physical layer of optical networks thanks to the fast development of unique and ultra-fast properties of optical signal processing [3], [8], [9].…”

Suppression of Cavity Time-Delay Signature Using Noise-Phase-Modulated Feedback

“…More recently, he proposed a physical WDM transmission by using chaotic spectral phase encryption where the phase modulator was driven by chaos from a chaos optical injection and a mirror feedback [22]. It was shown that the security of transmission arises partly from the complication of the driving signal of phase modulator, since any small difference from the authorized scheme prevents unauthorized attacks from decrypting the transmitted messages [22].…”

“…More recently, he proposed a physical WDM transmission by using chaotic spectral phase encryption where the phase modulator was driven by chaos from a chaos optical injection and a mirror feedback [22]. It was shown that the security of transmission arises partly from the complication of the driving signal of phase modulator, since any small difference from the authorized scheme prevents unauthorized attacks from decrypting the transmitted messages [22]. Also, the weak correlation between driving chaos synchronization signals and transmission carriers can improve the security performance in chaos communication, since such weaker correlation inhibits eavesdroppers illegal attacks from replicating the scheme of communication [21].…”