Neural Nets to decrypt?

[anon03e2@nyx.cs.du.edu (Fallen Angel)]

I am naive on a couple of fronts, so apologies if this is off-base.

As computing evolves, would it be very possible to use a neural net
or like system to design an ideal code-breaking engine? From my u
understanding, code-breakers are only as good as their designer's
knowledge of the algorithim. Such a hypothetical system would develop
its own cracking alogorithim which could be more efficient by several
factors.
  
I think another variation would the use of GA's to create a more efficient
code-breaker. I know that GAs have been used to achieve near-ideal results
in least-step sorting algorithims. Would code-breaking be the same
in principle?