Hybrid Encryption Research In Network Security

With the popu1 arity of the internet,more and more peop1 e tend to use the network to comp1 ete the various exchanges,particu1ar1 y in the fin1ancia1 sector.For examp1 e,on1in1e banking,paypa1 has become the main on1in1 e shoppin1g payment.So the security issues become the most important thing who the virtua1 providers concerned about.Current1 y there are thousands of network attack means.We often see that the network information is being intercepted,tampered with.This poses a great threat to the network further promotion and app1 ication.How to safe1 y transfer data,identify the authenticity of the data on the network,ensuring the integrity and non-rep1 udiation of information has become a hot research in recent years.Encryption techniques was studied and ana1 yzed in this thesis,and this thesis proposes a hybrid encryption technology to ensure the security of network system.At the same time,we introduces the research status of network security technology at home and abroad as well as the great challenges.Then introduces two kinds of encryption knowledge:asymmetric encryption algorithm and symmetric encryption algorithm.After careful analysis of the performance characteristics of various cryptographic algorithms,find out their advantages and disadvantages,finally extract the advantages of various algorithms to make up for their deficiencies.A new hybrid cryptography algorithm was proposed at last.This thesis analyzes the symmetric cryptographic algorithm,asymmetric cryptographic algorithm and message authentication cryptography algorithm.Finally,three cryptographic algorithms are identified in this hybrid encryption technology:DES(data encryption standard),ECC(elliptic curve cryptography),MD5(message digest algorithm).This not only ensures the correctness and robustness of data forwarding and transmission on the computer network,but also increases the data transfer rate.Our Hybrid encryption technology based on the above three algorithms,this thesis presents the design of a simple file transfer system.First introduce the design concept and then put forward a detailed operation plan and then to the system operation and maintenance are described in detail and A communication model of network system is constructed.At the end of this thesis,the algorithm selection and programming flow chart of each module are given,and the function of each module is described in detail.In general,the symmetric encryption algorithm is used to transmit data in computer network,this results in a lot of vulnerabilities in key distribution and management.It will costs a lot of human resources if the key is manually distributed.It also can not makes the data transmission on the network simple,quick and robust.Two kinds of DES and ECC of cryptographic algorithm is are very good algorithms.A hybrid encryption algorithm based on the above cryptographic algorithms can better ensure the robustness of the information transmission in the computer network and the efficiency of the transmission.In today's file transfer system based on hybrid encryption algorithm has not been a good promotion.So this thesis puts forward the idea and designs the system plan and application it in file transfer system.To arrive at a simple,rapid,robust and accurate data transfer in a computer network and let the key distribution and management simple and convenient.This kind of research is very meaningful.