The Whirlpool hash generator calculates a hash value of an entered text using the cryptographic hash function Whirlpool. The function calculates a hash value with a length of 512 bits. In order to achieve this length, and like the MD4 does, it adds additional bits if needed. Whirlpool is much slower than, for example, SHA-1 in the calculation. To calculate a hash, the entered text needs to be submitted.