Research On Co-Transport System Based On Self-Synchronization Key Generation And Double-Noise Interference Encryption

In the 5G era,while the optical networks are developed rapidly,optical networks also face many network security threats.Because of the inherent lack of protective measures,optical fiber communication can not assure information security.Illegal optical signal eavesdropping attacks on infrastructure which is mainly composed of optical fiber links will easily obtain communication information.Under the circumstance that algorithm encryption is no longer safe and quantum secure communication(QKD)is still immature,it is urgent to study how to use physical layer characteristics to internally protect the transmitted data,and finally realize a secure transmission system that integrates communication and encryption.Based on the theory of general secure transmission system and endogenous secure transmission,this thesis designs a physical-layer encryption cotransmission system that integrates dispersion based self-synchronized key generation and double-noise interference encryption.The main research work and innovation of this thesis are as follows:(1)This thesis designs a physical layer encryption co-transimission system providing endogenous security encryption protection and eavesdropping detection,and proposes a self-synchronized key distribution technology based on dispersion characteristics to supply security keys for both parties.Compared with the traditional key distribution schemes,the key generation scheme does not rely on any external synchronization information,which means that the key distribution process is completely carried out by the communication parties;the scheme adopts the hash function transformation technology to increase the eavesdropping mismatch caused by dispersion in optical links,which enhances the randomness and security of the key;the self-synchronization key distribution technology integrates the BER eavesdropping detection technology,which can timely and accurately detect the eavesdropping attack in the link to avoid more key information leakage.The simulation results show that,compared with other schemes,this scheme supports key distribution in higher speed and longer distance transmission scenarios;the scheme can realize error-free key distribution,and the key generation rate is very high;key distribution can effectively detect link eavesdropping attacks based on BER changes,with the information of the transmission system is kept secret.(2)This thesis proposes a double noise interference encryption based security encryption scheme,which is used for anti-interception transmission of communication information.On the basis of the original optical interference encryption scheme,the scheme improves the encryption method and adopts double noise interference encryption,to further increases the physical layer encryption key space and enhances the physical security of system transmission.In addition,in the encryption cotransmission system,the self-synchronized distribution key is used as the encryption parameter of double noise interference encryption,so that the endogenous security is realized with key parameters no pre-configured.This thesis simulates the establishment of a system link for the cotransmission to test the secrecy ability of the double-noise interference encryption technology and the ability of encrypted communication with key co-transmission.The simulation results show that,the co-transmission system can realize the integration of transmission and security of a single fiber channel,and compared with the traditional scheme,the double-noise interference encryption has higher transmission rate,longer transmission distance and stronger physical security.