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| Impossible Differential Cryptanalysis of 7-Round ARIR-192 |
| Xie Zuo-min Chen Shao-zhen |
(The PLA Information Engineering University, Zhengzhou 450001, China)
(State Key Laboratory of Mathematical Engineering and Advanced Computing, Zhengzhou 450001, China) |
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Abstract ARIA cipher is a new block cipher proposed by some South Korean experts in 2003. The design principle of ARIA is similar to the AES. ARIA is established as a Korean Standard block cipher algorithm by Korean Agency for Technology and Standards. In this paper, a new impossible differential attack on 7 rounds of the ARIA cipher is presented. By this attack, 7-round ARIA-192 is breakable with a data complexity of about 2176.2 encryptions,while the previous best impossible differential attack on ARIA broke on 7-round ARIA-256. Then some characters on diffusion layer are used to reduce the complexity of the ARIA-256 to 2192.2.
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Received: 12 December 2012
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Corresponding Authors:
Xie Zuo-min
E-mail: xiezuomin@126.com
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2013, Vol. 35 
