CSO secret communication

Abstract

A chaos shift parameter synchronisation (CSPS) system based on two different mutually coupled lasers synchronising with another laser is studied while a novel chaos shift orbit (CSO) encoding technique is presented for secret communication. CSPS between the emitter and receiver can still be obtained by shifting the emitter's parameter in real time, where the emitter operates its chaos to vary its orbit or jump across its orbit by using real-time current changes of one laser. Then, a CSO encoding scheme is implemented successfully. The emitter has numerous real-time shifting secret keys, so it is highly secure, and the signal is difficult to decipher.

Study on Quasi-Period and Chaos Synchronizations of a Laser Local Area Network by Shifting the Currents of One Chain Node Lasers

“…The parameters k=0.06 and k r =0.16 are taken, the currents I t2 =I r2 =30mA are taken, and the other parameters are listed references [5][6][7]9] while the currents I t1 =I r1 are shifted to change the LAN behavior to obtain multi-state synchronizations or chaos synchronizations in two chains of the LAN. When the currentsI t1 =I r1 =31.1mA are taken, the laser LAN is guided to show two double-cycle states and their synchronizations in two chains shown in figure 2.…”

“…Node lasers of receivers receive two lights from two source laser nodes of LAN to obtain multi-dynamics and their synchronizations. The node laser t1 or t2 of ALAN can synchronize with the laser r1 or r2 as another laser node of LAN, where there is an optic feedback in the laser r1 or r2 [4][5][6][7]9].The physical model of the laser LAN, name lyall lasers of the LAN, is described by the following equations [4][5][6][7]9]:…”

“…. And the other parameters are described by references [5][6][7]. The parameters L t2 =L t1 /2 are taken to imply that the LAN generates two different chains of the laser LAN.…”

“…In the past two decades, many nonlinear complex systems and networks, such as the star network, the global coupling network and the nearest coupling network and their synchronizations, have been presented [1][2][3]. Because optic networks and optic nonlinear systems are widely used in many fields, such as optic information and optic communication [4][5][6][7][8], we think there is a need for further research and further discussion on the laser LAN [9]. We will focus on studying how to obtain multidynamical-behavior synchronizations in two chains of laser LAN.…”

“…We will focus on studying how to obtain multidynamical-behavior synchronizations in two chains of laser LAN. So this paper discusses deep this laser LAN under different conditions to how to give the network's multi-dynamical-behavior synchronizations by shifting LAN's parameter [4][5][6][7][8][9]. The laser network characters an optic LAN.…”