| With the rapid development of optical fiber communication technology brings great convenience to people’s life,optical network occupies a dominant position in today’s communication network.In recent years,the transmission distance and bandwidth performance of optical networks have been improved.This means that the security of optical networks is increasingly important.At the physical layer,illegal attackers can not only eavesdrop on optical links,but also illegally access optical networks through injection attacks such as identity impersonation and camouflage,greatly threatening the security of optical networks.Therefore,it is very important to identify the validity of access users by applying security authentication technology at the physical layer.At present,the authentication technologies applied in the physical layer of optical networks mostly rely on the tolerance of devices,lack flexibility,and have insufficient fingerprint space,in great possibility leading to security risks of being reconstructed by unauthorized attackers.Optical chaos is widely used in optical network encryption technology because of its advantages of high complexity,high bandwidth and noiselike.However,the secure communication system based on optical chaos cannot resist the injection attacks of illegal attackers against optical networks.Theoretically,optical chaos is generated by deterministic systems,and some of its representations have fingerprint characteristics.It is promising to be applied to fingerprint authentication technology in optical networks.At the same time,optical chaos is controllable and its hardware parameters can be adjusted,which has high flexibility.However,at present,the application of optical chaos is still limited to encrypted communication,and the research on how to apply optical chaos to identity authentication technology is quite scarce.To solve the above problems,this paper focuses on the hardware fingerprint authentication technology in optical network,proposes two hardware fingerprint extraction methods based on electro-optical chaos,builds the corresponding fingerprint authentication system,and focuses on the identification performance of fingerprint authentication system for legal and illegal optical emission equipment.Specific research work is as follows:(1)Aiming at the problems of small fingerprint space,poor flexibility and low security of hardware fingerprint currently applied in optical network security authentication,this paper defines the largest Lyapunov exponent spectrum of chaos based on the phase space reconstruction technology in chaotic time series analysis and the calculation method of largest Lyapunov exponent.The fingerprint characteristics of the largest Lyapunov exponent spectrum of electro-optical chaos are verified.By constructing the authentication system of optical emission equipment based on the largest Lyapunov exponent spectrum of electro-optical chaos,the problem of secure identity authentication in optical network is solved,and the flexibility and controllability of the authentication system are improved.The simulation and experimental results show that the largest Lyapunov exponential spectrum of electro-optical chaos has good fingerprint characteristics and is sensitive to the feedback delay in the feedback loop.The authentication system based on the largest Lyapunovexponent spectrum can realize the recognition of legal and illegal emission equipment at the same time,the recognition accuracy can reach more than 96%,and has a certain anti-noise ability.When the signal-to-noise ratio is 18dB,the authentication system can recognize the optical emission equipment in the optical network effectively.(2)Aiming at the problems of small fingerprint space,poor flexibility and low computational efficiency of hardware fingerprint currently applied in optical network security authentication,based on the complexity analysis method of chaotic time series analysis,this paper proposes to use chaotic permutation entropy spectrum as hardware fingerprint to verify its fingerprint characteristics.By constructing the authentication system of optical emission equipment based on electro-optical chaotic permutation entropy spectrum,the problem of secure identity authentication in optical network is solved,and the computing efficiency of fingerprint is improved.The simulation and experimental results show that the permutation entropy spectrum of electro-optical chaos has obvious fingerprint characteristics and is sensitive to the feedback delay in the feedback loop.The authentication system based on permutation entropy spectrum can recognize both legal and illegal emission equipment in optical networks,and the recognition accuracy can reach about 97%.Under the condition of low signal-to-noise ratio,the authentication system based on permutation entropy spectrum can still distinguish legal and illegal optical emission equipment effectively.To sum up,in view of the shortcomings of the security authentication technology in the current optical network,such as poor flexibility and insufficient security,this paper proposes to apply the high-complexity,flexible and controllable optical chaos to the fingerprint authentication technology of optical network nodes,and designs two authentication systems for optical emission equipment respectively.Through simulation and experiment,the two authentication systems can realize the effective identification and authentication of optical emission equipment in optical network.The research results of this paper expand the application field of optical chaos sources and provide a feasible scheme for the application of optical chaos and its characterization in security identity authentication. |
