message transport
2.First, XML technique is adopted to express message as XML documentation To satisfy the requirements of C/S network communication system, a message transport protocol is brought forward for package and transport of all the data over a steady TCP socket, which is applied to asynchronous, secure and reliable communications.
5.Based on symmitric cryptographic techniques,asymmitric cryptographic techniques,message authentication code techniques,public key certificate and public key infrastructure techniques,Transport Layer Security (TLS) protocol and Secure Sockets Layer (SSL) protocol provide security mechanisms used to provide provacy,integrity for network communication data and authenticate the communication parties.
10.Besides, we integrated the transfer functions on IM server, they certified the transport between datagram encapsulated in ICQ protocol format or MSN protocol format and message encapsulated in proposed Jabber protocol format, that means it implemented the IM interaction between clients and other ICQ or MSN users.

