Explanation/Reference:
For example, the StoreFront module of the Fusion Order Demo application secures the web pages
contained by the checkout-task-flow task flow to grant access only to logged-in users (also known as
authenticated users). At runtime, the ADF Security framework performs permission checking against the
task flow's security policy to determine the user's right to complete the view operation. In this case, the
security policy must grant the view permission to the user if they are to complete the checkout process.
References: https://docs.oracle.com/cd/E21764_01/web.1111/b31974/adding_security.htm#ADFFD877