MD5
n_sanzee wrote: How to crack n times md5 encryption??
Did you mean calculate and crack md5 hashes?
cain can crack md5 and can calculate hashes from any text / HEX characters you give it.
here's another md5 calculator: http://www.softpedia.com/get/System/File-Management/MD5-calculator.shtml
Why not write your own brute forcer or dictionary attack where you take the variable 'i' and do md5(md5(i)) then compare that to the hash and see if you get a positive result. (thats for n = 2). Most rainbow tables programs generally look for n = 1 where the hash is one step away from the password, so make your own.
Here is an example of a python brute force password cracker… just adjust it to do an n md5 calc in the function "def checkPassword(password)"
http://www.rbgrn.net/blog/2007/09/how-to-write-a-brute-force-password-cracker.html
Another one is http://gdataonline.com/
You can always try my site http://www.hashcrack.org/ :)