Md5 Question

A friend of mine an i were wondering the following

If there is really a one in 20 million chance of and two files having the same MD5 hash

in theory, would it not be possible to recreate a file from the MD5 hash itself?

I understand the time involved in doing this through the "rainbow tables" method, not to mention the processing power.

but with new processors coming out with 8 cores or so....

you see where this is going...


 

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