The Keccak sponge function family

Guido Bertoni1, Joan Daemen1,2, Michaël Peeters1 and Gilles Van Assche1

2Radboud University




Software and other files


The figures above are available under the Creative Commons Attribution license. In short, they can be freely used, provided that attribution is properly done in the figure caption, either by linking to this webpage or by citing the article where the particular figure first appeared.


Tune Keccak to your requirements

The capacity parameter and chosen output length in Keccak can be freely chosen. Their combination determines the attainable security and the capacity has an impact on performance. This page gives you the optimal capacity and output length values, given the classical hash function criteria.

Required collision resistance: 2x x=
Required (second) preimage resistance: 2y y=

Please specify your requirements…