Ernest F. Brickell, Judy H. Moore, M. R. Purtill. Structure in the S-boxes of the DES. In Andrew M. Odlyzko, editor, Advances in Cryptology - CRYPTO 86, Santa Barbara, California, USA, 1986, Proceedings. Volume 263 of Lecture Notes in Computer Science, pages 3-8, Springer, 1986. [doi]
Abstract is missing.