Wang Mei-yi①,Tang Xue-hai①,Li Chao①,Qu Long-jiang①②
①Department of Mathematics and System Science, National University of Defense Technology, Changsha 410073, China; ②National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
Abstract：3D cipher is a new block cipher proposed in CANS 2008. It is different from all known block cipher as it uses the three dimension structure. According to the structure properties of 3D cipher, a new 5.25-round and a new 6.25-round square distinguishers are presented, and the square attacks on reduced- round 3D are improved. Attacking results demonstrate that 6-round attack is better than the known square attacks in data complexity and time complexity. Moreover, these two new distinguishers can be applied to 7/8/9-round 3D cipher.
2010, Vol. 32 
