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| The Meet-in-the-middle Attacks on Zodiac |
| Hai Xin Tang Xue-hai Li Chao |
| Department of Mathematics and System Science, Science College, National University of Defense Technology, Changsha 410073, China |
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Abstract Zodiac is a block cipher designed by a group of Korean experts. This paper studies the security of Zodiac against the meet-in-the-middle attack for the first time. Some new 9-round and 10-round distinguishers of Zodiac are found, and based on which some meet-in-the-middle attacks are made on 15-round and the full 16-round Zodiac. The results show that the full Zodiac-128/192/256 are not immune to the meet-in-the-middle attack.
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Received: 29 September 2011
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Corresponding Authors:
Hai Xin
E-mail: haixin@nudt.edu.cn
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2012, Vol. 34 
