AS1 : AS2 (Applicability Statement 2) is a specification about how to transport data securely and RELIABLY over the Internet

AS2 : AS2 (Applicability Statement 2) is a specification about how to transport data securely and reliably over the Internet. Security is achieved by using digital certificates and encryption.

Files are sent as "attachments" in a specially coded SMIME message (an AS2 message)

AS2 MESSAGES are always sent using the HTTP or HTTPS protocol (Secure Sockets Layer — also known as SSL — is implied by HTTPS) and usually use the "POST" method (use of "GET" is rare).

AS3 : AS3 (Applicability Statement 3) is the draft specification STANDARD by which vendor applications communicate EDI (or other data such as XML) over the Internet using File TRANSFER Protocol (FTP).

AS1 : AS2 (Applicability Statement 2) is a specification about how to transport data securely and reliably over the Internet

AS2 : AS2 (Applicability Statement 2) is a specification about how to transport data securely and reliably over the Internet. Security is achieved by using digital certificates and encryption.

Files are sent as "attachments" in a specially coded SMIME message (an AS2 message)

AS2 messages are always sent using the HTTP or HTTPS protocol (Secure Sockets Layer — also known as SSL — is implied by HTTPS) and usually use the "POST" method (use of "GET" is rare).

AS3 : AS3 (Applicability Statement 3) is the draft specification standard by which vendor applications communicate EDI (or other data such as XML) over the Internet using File Transfer Protocol (FTP).