On Jun 26, 2008, at 5:50 AM, Tom=E1s =D3 h=C9ilidhe wrote: > * Take a microcontroller that just doesn't have a facility for reading > the code memory out of it. No facility. At all. Fullstop. Ah. A write-only memory! The microcontroller will be pretty useless = if it can't read its own code memory. And if IT can read it, there's = probably a way for a cracker to read it too... BillW -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist