中文摘要：

分组密码算法Zodiac支持3种密钥长度,分别为Zodiac-128、Zodiac-192、Zodiac-256。利用零相关线性分析方法评估了Zodiac算法的安全性,首先根据算法的结构特性,构造了一些关于Zodiac算法的10轮零相关线性逼近,然后对16轮Zodiac-192进行了多维零相关分析。分析结果显示：攻击过程中一共恢复了19个字节的密钥,其数据复杂度约为2124.40个明密文对,计算复杂度为2181.58次16轮加密。由此可得：16轮（即全轮）192 bit密钥的Zodiac算法（Zodiac-192）对于零相关线性分析方法是不安全的。

英文摘要：

Zodiac is a block cipher algorithm and it supports 3 master key lengths which are called Zodiac-128, Zodiac- 192 and Zodiac-256. The security of Zodiac algorithm was evaluated by using zero-correlation linear cryptanalysis. Firstly, 10- round zero-correlation linear approximations of Zodiac algorithm were constructed according to the structural characteristics of the algorithm. Then, the multidimensional zero-correlation linear cryptanalysis on 16-round Zodiac-192 was conducted. The analysis results show that 19-byte keys were restored totally in the process of attack, the data complexity was about 2124.40 known ciphertexts and the computational complexity was 2ross encryptions of 16-round. Thus the Zodiac-192 algorithm with the 192-bit key of 16 rounds （full rounds） is not immune to the zero-correlation linear cryptanalysis.