Chain Enterprise Information Management System Design And Implementation Of Encryption Technology

With the development of the moddile chain enterprises and computer network especially the Internet, using MIS which base on ADSL access internet become the most method of manage.To satisfy the demands of the e-conunerce,the secure transport of data has become the emphasis of network environment and one of important factors of network development. The security of system build on trustless network receives more and more attention.The Internet is based on TCP/IP protocols,but TCP/IP protocols can't guarantee the security. To solve these problems,various solutions have been brought up.SSL protocol is one of the most famous secure protocols. SSL protocol belongs to the session layer,and plays an important role in the Internet.This thesis consists of four parts:The first one analyses the demands of the moddile chain enterprises MIS base on ADSL access. In this part,we discuss the structure of the distributed database MIS system used on ADSL access, then discuss the three types of transferring data structure data, record data, stream data, analyses the data synchronization method of the types.The second one we analyses the specialty of ADSL access network and the varieties attacks such as passive sniffing attack, active man-in-the-middle attack and password guess attack. At last we discuss the method of authentication which can satisfy the demands of communication security.The third one analyses SSL based on confidentiality, integrity and authentication, SSL handshake protocol are described in detail. Provides some measures against current attacks on SSL protocol.The fourth one,based on hard research work,describes the design and implementation a SSL security module based on OpenSSL and Microsoft VC++ and Delphi Windows environment. We discuss the client module and server module, analyses the implementation of SSL handshake protocol and data transmit.In the end,the author points out the work should be improved in the future.