Keccak-224 Online Hash Function / Generator

Keccak is a cryptographic primitive family which also includes SHA-3.Keccak is based on a novel approach called sponge construction. Sponge construction is based on a wide random function orrandom permutation, and allows inputting ("absorbing" in sponge terminology) any amount of data, and outputting ("squeezing")any amount of data, while acting as a pseudorandom function with regard to all previous inputs. This leads to great flexibility.

More information: Keccak Digest