Based on Personalization account configuration, API calls may
require HMAC authentication as a header within the request. HMAC is a
keyed-hash authentication code that calculates a message authentication
code (MAC) involving a cryptographic hash function in combination with a
secret cryptographic key.
This authentication scheme protects your data and ensures that your
secret keys stay secure, and utilizes the Access Key ID and secret
access key associated with your Personalization subscription.
Acquia has HMAC implementation scripts in several
languages, including the