Chaos Shift Orbit Modulation for Secret Communication

A novel laser system of chaos shift parameter synchronization (CSPS) and dynamic chaos shift orbit synchronization (CSOS) is studied in-depth when the parameters of transmitter shift in time, but the parameters of receiver do not change. We find that the system can obtain CSPS between the transmitter and receiver when the transmitter's current is adjusted as chaos shift parameter (CSP) or an alterable parameter (AP). And CSOS still be achieved when the chaotic behavior and its trajectory of the emitter vary or jump in time with a real-time alterable current change in one laser. And our study proves that CSP and AP do not disturb to achieve the synchronizations. Based on CSPS and CSOS, a novel chaos shift orbit modulation (CSOM) coding scheme is studied via a real-time CSP change in the emitter for optics secret communications. The CSOM demodulation of an information is proved in two cases that a CSOM encoding technique is performed successfully. This system has real-time shift orbit performance, so it has high security and increases the difficulty for outside observers to break the information.