What about a birthday attack? a birthday attack seems to work against MD5
Nikhil
Random strings are harder to get, but still possible with a brute force approach (a cracker that tries every combination of n letters, digits and special characters that exist). This however takes very long and is not feasible for most.
"not feasible for most" is a gross understatement.
The MD5 hash is 128 bits long. This means that there are 340,282,366,920,938,463,463,374,607,431,768,211,456 values. This means that even if you could try a TRILLION combinations a second it would take you 10,790,283,070,806,014,188 years to break!
A brute force attack against MD5 won't work.
However a dictionary attack is much more likely to work againstthis algorithm. That is not due to any weakness of the algo but due to human tendency of picking works like "god" , "password" etc as passwords. -- vinayak hegde
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