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Letters frequency analysis
Whirlpool Hashing Tool
More about Whirlpool hashing algorithm :
is a hashing function created by Vincent Rijmen and Paulo Barreto, it uses a 52 bits hashing key, exactly like
which makes its using way slower than md5 or sha1 for instance. This relative slowness allows Whirlpool to be more secure against brute-force, which still remains possible with the actual hardware calculation power. Whirlpool implementation was also made to be slow, not as slow as slow hashes like for instance
, but still enough to discourage bruteforce usage. Though a well thought bruteforce could succeed in cracking whirlpool long passwords.
Whirlpool produces a very long hash of 128 bytes, as the sha512, and so isn't very used for password storage in databases. However, this could be a good thing as you won't find a lot of lookup tables online, since this hashing function isn't widely used. As the others hashing functions, using a salt is advised to make the bruteforce way more complicated.