Abstract
We discuss the impossible differential cryptanalysis of the blockcipher Zodiac [7]. The main design principles of Zodiac are simplicity and efficiency. However the diffusion layer in its round function is too simple to offer enough security. An impossible differential cryptanalysis is a proper method to attackthe weakness of Zodiac. Our attack using two 14-round impossible characteristics derives 128-bit master key of the full 16-round Zodiac with its complexity 2119 encryption times faster than the exhaustive search. The efficiency of the attackcompared with exhaustive search increases as the key size increases.
Cite
CITATION STYLE
Hong, D., Sung, J., Moriai, S., Lee, S., & Lim, J. (2002). Impossible differential cryptanalysis of zodiac. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 2355, pp. 300–311). Springer Verlag. https://doi.org/10.1007/3-540-45473-X_25
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