S-Box Modifications and Their Effect in DES-like Encryption Systems

This paper presents the substitution boxes (s-boxes) found in many block ciphers, and more specifically in DES-like encryption systems. It begins with a brief history of the Data Encryption Standard (DES) and the first public question on the chosen s-boxes. An outline of the DES algorithm is...
By Joe Gargiulo
July 25, 2002

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