On Mon, 7 Dec 1998, William Chops Westfield wrote:

> Well, I gingerlly took apart one of our encrption devices (I assume that
> ones protected by explosives have warning labels), and its protection
> seemed to consist of switches that shut off the power to battery-backed
> sram that held the code/keys/whatever whenever the cover was removed.
>
> Not very applicable to PICs, but...

Those are easy prey after an X-ray picture to show the switches. You
should not post this kind of info here imho. Neither should I.

Peter