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Deprecating September 2026: HTTP Signature Messaging

Set Up an HTTP Signature Message [DEPRECATING]

To set up HTTP signature messaging, you must complete the tasks described in this section.
WARNING
By
September 2026
, all merchants using HTTP signature messaging must migrate to JSON Web Token (JWT) messaging in order to support message-level encryption (MLE). You risk transaction failures if you do not implement this update. If you are setting up your system to be REST-compliant for the first time,
National Australia Bank
 recommends using JWT messaging.
To update your system to support JWT messaging, use one of these methods:

Figure:

Set Up HTTP Signature Messaging
  1. Sign up for a test account. See Sign Up for a Sandbox Account.
  2. Create a shared secret key. See Create a Shared Secret Key Pair.
  3. Construct a message using HTTP signature security. See Construct Messages Using HTTP Signature Security.
  4. Go live by transitioning your sandbox account into a production account. Going Live.
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