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.


Third cryptanalysis prize

30 September 2009

We announce the third prize for the most interesting cryptanalysis of Keccak. The results must be publicly available on an URL that is sent to keccak -at- noekeon -dot- org before December 5, 2009 at 23:59 GMT+1 (i.e., before Sinterklaas or Saint Nicolas).

The third prize consists of beer, like the first one. This time we offer Lambic beers that according to myth can only be brewed in the surroundings of Brussels thanks to wild yeast and mysterious bacteria that would not occur anywhere else. Anyway, the prize is a case with 24 (the new number of rounds in Keccak-f) bottles of Lambic-based beers from breweries such as Cantillon, Girardin, and 3 Fonteinen.

Like for the previous prizes, who wins will be decided by consensus in the Keccak team, based internally on a system of points. Some hints:

We reserve the right to extend the deadline in the absence of interesting results or when we consider that the presented results are too small increments compared to known results.

We hope analyzing Keccak is a fun and interesting challenge, and we appreciate any submitted work!