High-speed Physical Random Number Generation Theory And Experimental Research Based On Chaotic Semiconductor Laser Ring

With the advent of 5G era,massive data will be generated and transported between networks every second,and more effective security systems are needed to build the interconnected world of everything.With the continuous pursuit of security and the continuous development of encryption technology,high-speed multi-channel physical random number generation system is born.Because of the good randomness and almost indecipherable characteristics of the laser chaotic entropy source,it is applied to the generation system of physical random number.At the same time,a variety of chaotic entropy sources with different performance have been produced,which have the characteristics of low time delay signature(TDS),high bandwidth and high complexity.In this thesis,our main research contents are:1.A chaotic pulse generation system based on dual chaotic optical injections(DCOI)system of DFB is proposed.The performance of TDS concealment is studied by auto-correlation function.At the same time,the influence of controllable parameters including driving current,coupling strength and frequency detuning on TDS is analyzed by numerical simulation and experimental verification.With the single chaotic optical injection network(SCOI)as a reference,it is found that the performance of TDS concealment is improved to a certain extent due to the introduction of the second path of light,and the tunable range is also greatly expanded.At the same time,the generated chaotic signals has a higher bandwidth.Finally,two chaotic signals with low TDS and high bandwidth are obtained simultaneously.2.In order to adapt to the development of multi-channel network,a heterogeneous ring network with non-uniform delays is proposed based on three DFBs.The performance of TDS concealment is studied by numerical simulation and the final result is shown.At the same time,an experimental platform is built to explore the influence factors on the performance of TDS from the experimental point of view.The advantages of heterogeneous ring network are proved by comparing with homogeneous delay network.At last,we get the three-channel of chaotic entropy sourses with TDS cealment at the same time.3.Based on heterogeneous ring network with non-uniform delays,the parallel output of 7-channel chaotic entropy source is realized by multi-channel processing technology.At the same time,the influence of post-processing steps on the distribution of the original chaotic sequence is analyzed.Finally,seven parallel random numbers with the total speed up to 2.24Tb/s are obtained,and the randomness of random numbers is proved by NIST test system.Then the factors that affect the rate of random number are analyzed carefully.