AS2 (Applicability Statement 2)

A specification (RFC 4130) for secure, reliable transport of structured business data over HTTP/HTTPS. AS2 uses S/MIME encryption and digital signatures to ensure data integrity, authentication, and non-repudiation. It is the dominant protocol for EDI document exchange in retail, healthcare, and manufacturing.

Related Terms

MDN (Message Disposition Notification)S/MIME (Secure/Multipurpose Internet Mail Extensions)EDI (Electronic Data Interchange)RFC 4130