05686149

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05686149 Moldovyan, Nikolay A. On cipher design based on switchable controlled operations. Gorodetsky, Vladimir (ed.) et al., Computer network security. Second international workshop on mathematical methods, models, and architectures for computer network security, MMM-ACNS 2003, St. Petersburg, Russia, September 21--23, 2003. Proceedings. Berlin: Springer (ISBN 3-540-40797-9/pbk). Lect. Notes Comput. Sci. 2776, 316-327 (2003). 2003 Berlin: Springer EN Fast Encryption Data-Dependent Operations Hardware-Oriented Ciphers Switchable Operations Controlled Operations

doi:10.1007/b12005

Summary: This paper introduces a new type of primitives called switchable controlled operations (SCO). The SCO are proposed to be used in the design of the fast ciphers suitable to cheap-hardware implementation. Use of the SCO promotes to solve the problem of the weak keys and homogeneity of the encryption transformation while the simple key scheduling is used. The SCO-based iterative ciphers that are free of reversing the key scheduling are proposed to minimize implementation cost. Different variants of SCO and SCO-based iterative cryptoschemes are considered.