Using Hmac() And An Ordered Struct To Implement A Secure Email Tracking Pixel In Lucee 5.3.2.77

Ben Nadel demonstrates how an ordered, or linked, struct can be used to generate a hmac signature in Lucee CFML 5.3.2.77. This hmac signature can be used to verify an email tracking pixel that makes an unauthenticated request back to your ColdFusion application server.