We announced the winners of the Keccak Crunchy Crypto Collision and Pre-image contest during the Fast Software Encryption 2012 workshop.

The winners are:

• Paweł Morawiecki for solving the preimage and collision challenges on 1 and 2 rounds, for all instances except Keccak[r = 40, c = 160];
• Alexandre Duc, Jian Guo, Thomas Peyrin and Lei Wei for independently and simultaneously solving the collision challenges on 1 and 2 rounds of Keccak[r = 1440, c = 160];
• Itai Dinur, Orr Dunkelman and Adi Shamir for finding collisions on Keccak[r = 1440, c = 160] with 3 and 4 rounds.

We handed out the prizes to the winners during the presentation of the results. Paweł was not present, so we contacted him and arranged with him how to give him his prize.

Congratulations to all!