Applicability Statement 2 (AS2) is one of two file transfer protocols we use in Global Corporate Access channel for file exchange with our customers over the internet.
The AS2 standard uses Secure Multi-Purpose Internet Mail Extensions (S/MIME) and HTTP or HTTPS to transmit information securely. AS2 can be used by the Company to digitally sign/encrypt/ transport/verify all types of formats supported by the Bank, such as ISO 20022. Both successful and unsuccessful transfers are followed by an MDN (message disposition notice) if requested, allowing the sender to know if the file transfer was successful.
AS2 incorporates encryption and digital signatures. Once encrypted, only the intended recipient can read the data and once signed, there is confidence in who sent the data. AS2 uses public and private keys and certificates for encrypting and signing messages. PGP signatures can be used in addition to the native AS2 certificate.
AS2 is not an option if:
- You do not have a web server, which can be used to host the AS2 software.
- Your web server is not always accessible from the Internet due to your corporate firewall restrictions.