Design And Implementation Of Terminal Transmission Subsystem Of Security Transmission Service

The increasing scale of the networks makes the number of network devices in the Internet becomes extremely huge.These devices achieved by a variety of protocols and technology may become the target of hacker attacks,so that users' data transmitted in the network are facing information disclosure threats.Aiming at the security problem of users' transmitting data,Security Transmission Service proposes to use the time slot forwarding strategy and multi-connection transmission strategy to provide users with secure transmission service under the background of SDN(Software Defined Networking).In this paper,a solution is designed for multi-connection implementation of Security Transmission Service,and on this basis,a variety of encryption algorithms are used to process the transmitted data.Multi-connection transmission is achieved by the user and the proxy server.The SOCKS5 proxy forwards users' data through multiple connections,while achieving the effect of hiding users' information.After the data is split,each fragment is encrypted and then transmitted over a different connection.The data after being split and encrypted becomes a ciphertext.The ciphertext is sent through multiple connections.Each connection adopts the time-slot forwarding strategy.Multiple security measures work together to minimize the risk of user information leakage.Commonly used advanced encryption algorithms,such as AES,IDEA,etc.,generate multiple sub-keys and operate multiple iterative operations to encrypt and decrypt.In order to cope with the handling of multi-connection transmission in the system,in this paper a new data encryption algorithm is proposed which is faster in computation,simpler in operation and more efficient.The algorithm has the characteristics of serial cipher,which not only ensures the simple and efficient operation process,but also does not generate a large number of key data,and can smoothly cooperate with the multi-connection transmission process to provide users with fast and reliable encryption under the Security Transmission Service background.This paper first introduces the researches of network management methods and data encryption algorithms in SDN networks,and then solves the key problems of data processing and encryption and decryption in the context of multi-connection transmission.Based on this,the Terminal Transmission Subsystem of Security Transmission Service includes the overall architecture,function module,module interaction interface and so on,and describes the concrete realization of each module in detail.At last,a test environment is set up to complete the function test of the system,which verifies the reliability and availability of this system.