If you know the secret, you're in.
Communication in code to an infidel is strictly forbidden!
This so called 'Sultan' doesn't even have a beeber yet.
I am tempted to report you to the council and have your decoder ring suspended for at least a week.
Now repent, and sin no more.
You do realize that writing in white is racist, don't you?
Love that invisible writing. Gotta get into the sandbox and see how to do it sometime.