I think Thomas was simplifying rainbow tables in his post, to make it more understandable. In practice, you wouldn't use all combination of alphanumerics. You w

I think Thomas was simplifying rainbow tables in his post, to make it more understandable. In practice, you wouldn't use all combination of alphanumerics. You would use a dictionary. This greatly restricts the search space. http://en.wikipedia.org/wiki/Rainbow_table http://en.wikipedia.org/wiki/Rainbow_table http://en.wikipedia.org/wiki/Dictionary_attack http://en.wikipedia.org/wiki/Dictionary_attack