The password was given to me by a man who died in the dungeons of Arrakeen. You
see, that is where I got this ring in the shape of a tortoise. It was in the
suk outside the city where I was hidden by the rebels. The password? Oh, that
has been changed many times since then. It was "Persistence." And the
countersign was "Tortoise." It got me out of there alive. That's why I bought
this ring: a reminder.
-Tagir Mohandis: Conversations with a Friend