Subject: [CRUNCHY CONTEST] 3 rounds, width 800 and 1600, pre-image From: "meicheng.liu@gmail.com" Date: 25/04/16 11:43 To: Cryptographic competitions CC: "crunchy@noekeon.org" , "ntu.guo@gmail.com" Dear Keccak Team and all, We, Jian and Meicheng, found solutions for pre-image challenges on Keccak[r=640, c=160, 3 rounds from 0 to 2] and Keccak[r=1440, c=160, 3 rounds from 0 to 2]. A pre-image of 00 7b b5 c5 99 80 66 0e 02 93 is: "\x8a\xe6\x97\x10\xff\xff\xff\xff\x42\xa3\xc2\x97\x90\x5c\x9e\x6\x0\x0\x0\x0\x44\x12\x28\x91\x0\x0\x0\x0\xa3\xa3\xc3\x3b\x0\x0\x0\x0\x0\x0\x0\x0\xcb\xe9\xac\x56\x0\x0\x0\x0\xe9\xac\x56\xcb\x0\x0\x0\x0\x0\x0\x0\x0\xb2\xcc\xa3\x2b\x0\x0\x0\x0\xd3\xc4\xf\x99\x0\x0\x0\x0\x6d\x34\x2c\xff" message length = 638 A pre-image of 06 25 a3 46 28 c0 cf e7 6c 75 is: "\x6f\xd3\x96\x67\x76\xbc\xe0\x1\xff\xff\xff\xff\xff\xff\xff\xff\x4e\x81\x99\xa2\x21\xfc\x25\xbd\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x6a\x69\xe\x6f\x5f\x26\x85\xcc\xff\xff\xff\xff\xff\xff\xff\xff\xb9\x75\xb0\xe\x9c\x33\x6f\x3a\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\xc2\x9d\x45\x3b\x90\xc7\x2a\xd2\xff\xff\xff\xff\xff\xff\xff\xff\xc7\x2a\x6a\x98\xe9\x19\x3a\x90\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x87\x31\xe2\xf5\xb5\x74\x96\x53\xff\xff\xff\xff\xff\xff\xff\xff\x9e\xc8\x5e\xe3\x54\xd6\x70\x17\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\x0\xbf\xe9\xc0\x39\xf3\xd6\x26\xb3\xff\xff\xff\xff\xff\xff\xff\xff\xae\x16\x1d\x17" message length = 1438 We will later write a paper to explain how the results were found. Best Regards, Jian Guo (Nanyang Technological University, Singapore) Meicheng Liu (Nanyang Technological University, Singapore and State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, China) -- You received this message because you are subscribed to the Google Groups "Cryptographic competitions" group. To unsubscribe from this group and stop receiving emails from it, send an email to crypto-competitions+unsubscribe@googlegroups.com. To post to this group, send email to crypto-competitions@googlegroups.com. Visit this group at https://groups.google.com/group/crypto-competitions. For more options, visit https://groups.google.com/d/optout.