Immediately after posting the results of the contest, we announce that the Keccak Crunchy Crypto Collision and Pre-image contest re-opens and continues through end 2012.

The challenges remain the same, although a few entries are closed to encourage new approaches. More specifically:

• All the collision and pre-image challenges for Keccak[r = 40, c = 160] remain open, from 1 to 12 rounds, as none of these were solved.
• For the other instances, pre-image challenges start from 3 rounds and collision challenges from 5 rounds. The only unsolved challenges that are closed are 3- and 4-round collisions, which can likely be solved by a straightforward application of the techniques of Itai Dinur, Orr Dunkelman and Adi Shamir.

We suggest all interested people to subscribe to our mailing list, and solutions shall be sent to this mailing list, as detailed here, before before December 31, 2012 at 23:59 GMT+1.