AS2.5

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AS2.5 is an information-oriented application protocol used for exchanging data over the Internet with a special focus on server-to-server communication. It works by moving information like files, web pages and other forms of text data between two devices running different applications. For example, AS2.5 can be used to transfer files from a web server to a client, if both are configured with an AS2.5 compatible application. It provides a secure, reliable, and fast way to exchange data between the two.AS2.5 is based on HTTP and essentially adds a layer of authentication and encryption to HTTP messages. It uses SSL (Secure Sockets Layer) to encrypt data in transit and a 128-bit or higher encryption key to authenticate the message\'s sender and receiver. This makes it suitable for exchanging sensitive data over the Internet.At the core of AS2.5 is the agreement between two entities to use this protocol for communication. This agreement is called the AS2 Trust Relationship, which consists of four distinct parts: an AS2 identification, an SSL certificate, a transport address, and the permitted message types (e.g. HTTP Post vs. HTTP Put). When these four elements have been established, the two entities can begin exchanging data securely.AS2.5 also has the capability to enable customers and suppliers to exchange files and messages via a peer-to-peer system. This is referred to as the "AS2 relay" and operates independently of a centralized server. It works by allowing two parties to send and receive files without storing the files on a central server. This is useful in scenarios where there is a need to send large files or messages in a secure manner, but where the setup of a full server infrastructure is not feasible.Finally, in terms of performance, AS2.5 is relatively efficient. Its protocol is optimized for web traffic, so messages and files are transferred quickly. Additionally, its encrypted format means that data is transferred securely, resulting in a more efficient environment than a non-encrypted protocol.In summary, AS2.5 is a powerful application protocol that enables two devices running different applications to securely and reliably exchange data over the Internet. It utilizes a set of trust relationships to enable encrypted data transfer and also has the capability to enable peer-to-peer file exchange. It has proven to be efficient in terms of performance, and provides a robust platform for exchanging data securely.

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