WH Tan wrote:

> Just read the CodeGuard securities feature of latest Microchip micro.
> Sounds interesting.
> 
> http://www.microchip.com/codeguard/

Yes, a useful concept. 

When you check out the main difference between figures 3 and 4 in their
white paper
(http://www.microchip.com/stellent/groups/dspic_sg/documents/devicedoc/en027547.pdf),
it seems to me that it is that "semiconductor manufacturer 1" and
"semiconductor manufacturer 2" from figure 3 ("existing design flow") are
replaced with "Microchip" in figure 4 ("redesigned to incorporate
CodeGuard")...  :)

Probably the main problem with that type of security is that it is not open
source, so you kind of either believe that it works or you don't. With up
to 100k of secured storage, that may contain a decent investment -- which
of course makes for a decent incentive to get to it, too.

Gerhard

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