Once again this is simply not true to say the encrypting your code doesn't work its a well established technique,its used all over the place and there seems to be one paper about how to crack a processor which had a bug in 1989.If you had read what i was trying to say I was simply trying to say that it used to be the case that you could defeat the ds-whatever with voltage pulses but i doubt its true now,as i said before you will never stop the determined hacker.I was trying to make the point that deliberatly damaging a processor is a bad idea, a better idea is to use encryption,obsfication and any other techniques to deter and hamper the hacker.And once again we will have someone saying that 'oh if you put the ds-whatever in the fridge and hit it with a hammer then it breaks the code' this is not the point,it is entirely irrelevent.