Is there a way that I can hide the name of an image file from the user so that they can't see what it's called, and infer anything from it? So if the real filename was something like bright01.gif the user would see something like image01101.gif where those numbers are randomly (or quasi-randomly) generated.
There are two methods in software design. One is to make the program so simple, there are obviously no errors. The other is to make it so complicated, there are no obvious errors.