Neural Nets to decrypt?

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?