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Message

Re: Flash Security Clarification --- some sad facts

2005-12-25 by derbaier

--- In lpc2000@yahoogroups.com, "jayasooriah" <jayasooriah@y...> wrote:
>
> There is a technique called JTAG boundary scanning.  From memory, (I
> did this some years ago) boundary scanning does not require the target
> to come out of reset.  In such a system, the "ememy" is all over the
> code long before the processor even wakes up, and thus how quickly it
> takes to secure flash becomes irrelevant.
> 
> Incidentally, the unavailablity of BSDL files (for LPC devices) does
> not prevent this type of attack.  There are methods by which one can
> "discover" boundary architecture by blind scanning.
> 

It is really hard to believe that any manufacturer of high volume
systems would buy a component with missing BSDL files!  That would
make tests costs and time too high.  Are you sure that major
manufacturers can not get BSDL files for LPC parts?  

-- Dave

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