What is AS2?
AS2 stands for Applicability Statement 2 and is one of the most popular EDI (Electronic Data Interchange) transmission standards. The reason for its widespread use in business is that AS2 uses the Internet as a means of communication. Thus, the protocol is not dependent on the use of a proprietary network. AS2 uses both HTTP and HTTPS protocols for transmission over the Internet.
AS2 standardization therefore enables a cost-effective and secure exchange of messages. The function of the transmission standard is simple: messages are digitally packaged, encrypted and signed. The recipient then confirms the timely delivery of the message to the sender with a receipt. This receipt is also called MDN or Message Disposition Notification. The message format is irrelevant for the standard. All data can be transported securely and reliably using the AS2 protocol.
The AS2 protocol is published by the Internet Engineering Task Force – IETF. This is a working group of network specialists working on the further development of the Internet. In addition to AS2, AS1 and AS3 also exist, but they are not popular.