Research And Application On Security Protocol In Transport Layer

DTLS (Datagram TLS) protocol protects the information security transmitted in asecure and confidential channel established between two ends, but DTLS protocolcannot achieve transparently the security of information transmitted without modifyingthe existing applications, and the endpoint authentication mechanism that DTLSprotocol is based on is bound to increase network transmission overhead and occupymore network bandwidth. Therefore, DTLS protocol is not very good to meet thesecurity needs of information transmission in the special network applicationenvironments.This paper researches the basic principle of network security in transport layer andSSL/TLS(Secure Socket Layer/Transport Layer Security) protocol, analyzes the processof establishing a secure connection and relevant source codes to DTLS protocol inOpenSSL. According to a special network environment, a kind of newly authenticationprotocol in transport layer is designed based on DTLS protocol, and the protocol andauthentication control software is implemented in Visual Studio2010developmentenvironment. The protocol can run on operation Systems such as Windows and Linux,and assure the information security transmitted in the special network environment.Finally, the paper gives an security analysis of the protocol based on BAN logic andverifies it.