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RE: DRE systems can't be trusted???

>   Actually this would be far harder to do than suggested here.  Consider
> the many possible checks to catch just this kind of attack.  The simplest
> is to compare the code that is used to a master copy.  This can be done by
> computing hash values and/or by a bit-by-bit comparison.  Thus, if the
> code changed, it would be easily caught.

It is not the code that is the problem.  Electronic DRE sufferes from one
critical difference from optical scan or other paper based systems.  Paper
is a write-once medium.  Memory cards are read-write.