I'm not a lawyer, so I'm pretty sure what I'm about to say wouldn't hold up in a court of law, but if you claim your system is 100% secure, then someone hacks it, I think by definition your are allowed to be there and not subject to the CFAA. In a 100% secure system you can't get into anything you're not allowed to, so if you're accessing something, you by definition, are allowed to.

We all here no, there is no such thing as something 100% secure, but if you're gonna go making wild claim, you should have to stand by them.