How AAA action works

AAA,Authenticaion Authorization and Audit.This is the one of the most important security feature provided by DataPower. Every time if we want to secure a web service and we want to let the authorized user to access that service we use AAA mechanism.
There is a step wise process

AAA working flow
Extract the Identity credentials from the input message or request
Authenticate the credentials extracted from payload
Maps the credentials with the authorization server credentials
Extract the resource from the input message or request
Map the resource with the authorization server which the credentials are assigned it to
Authorize the credentials from the first 3 steps with the resource in 4th and 5th one.
Post Processing of the request