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Did breaking MD5 require a computer the size of the universe 20 years ago?



It was thought to, which is why it became so popular. It turned out to be wrong.


Not really. It was cracked by a distributed network of ordinary computers were people volunteered CPU time.


MD5's compression function was already broken 20 years ago: http://cseweb.ucsd.edu/~bsy/dobbertin.ps




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