> > The plan was to encapsulate any devices so that an attempt to find
> > any worthwhile measuring spot in the circuit would kill it :-)
>
> Remember that when you deliver more than 1 device, the attacker can
> practice on the 1st, and carry out the attack on the 2nd.

Yes, that's a good point. But if there's a 1024-bit key involved, and s/w
is tied up in an unreadable micro, the effort required to get a micro out
of a block of epoxy, then try to get the s/w out, then break the key should
be a pretty big deterrent. I hope. I've tried myself to get chips out of
epoxy, not easy, even with a normal circuit. A flimsy one, say with fine
wires and SMT components, would be pretty tricky to get out in one piece

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