The Keccak sponge function family

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

2Radboud University




Software and other files


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First 6-round collision challenge solved

1 March 2017

We congratulate Ling Song1,2,3, Guohong Liao4,1 and Jian Guo1 for solving the 6-round collision challenge on Keccak[r=1440, c=160].

The collision search took a computational effort of about 250 evaluations of the Keccak-f rounds. It follows an improvement of the technique previously used for solving the 5-round collision challenge in May last year (then solved by Jian Guo, Meicheng Liu, Ling Song and Kexin Qiao).

  1. Cryptanalysis Taskforce, Temasek Laboratories @ Nanyang Technological University, Singapore
  2. State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, China
  3. Data Assurance and Communication Security Research Center, Chinese Academy of Sciences, China
  4. South China Normal University, China