This question already has an answer here:
- How to securely hash passwords? 12 answers
As in md5(md5(md5(x)))...
I can remember coming across that in some piece of code. If the attacker can somehow reverse md5(md5(md5(x))) into md5(md5(x)) then he certainly can reverse md5(md5(x)) into md5(x) and the x. However if it takes some good amount of time to reverse the first hash then hashing the hash can slow him down. I cant make up my mind on this issue hence the question