Deukjo Hong, Jaechul Sung, Shiho Moriai, Sangjin Lee, Jongin Lim. Impossible Differential Cryptanalysis of Zodiac. In Mitsuru Matsui, editor, Fast Software Encryption, 8th International Workshop, FSE 2001 Yokohama, Japan, April 2-4, 2001, Revised Papers. Volume 2355 of Lecture Notes in Computer Science, pages 300-311, Springer, 2001. [doi]