John Kelsey writes:
> There's some question about how hard it will be to design
> hardware that will be DPA-resistant for different
> algorithms.
Big on-chip caps. Lithium batteries. Tamper-resistant housings.
That's what Dallas Semiconductor uses for its 1-Wire devices,
including the famous Java ring. It works to protect data, but not
algorithms, because once you extract the algorithm, you've got it.
With data, you have only to make extraction more expensive than the
data is worth.
You could also superglue the chip to something very hard, so that you
can't probe the chip without getting the cover off, and if you try,
you destroy the chip trying.
--
-russ nelson <[EMAIL PROTECTED]> http://russnelson.com
Crynwr sells support for free software | PGPok | Government schools are so
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