AS2 protocol is based on the HTTP (Hypertext Transfer Protocol) or its secure version, HTTPS through the Internet or any TCP/IP network for secure and reliable data exchange. Through the use of encryption and digital signature data transmission format S/MIME (secure Multipurpose Internet Mail Extension) data, and the use of MDN (message disposal notice) to ensure that data can be transmitted securely on the internet. LinkAS2 complete the protocol, and facilitate the configuration management of enterprise personnel