Abstract
This paper describes new variants of the MESH block ciphers, that use the same group operations of the IDEA cipher but operate on 8-bit words, and are estimated to be faster than the AES on 8-bit processors. These results corroborate the high flexibility of the MESH cipher design, demonstrating their high adaptability to 8-bit smart card processors, such as the 8051. All the design features of the original 16-bit word-oriented MESH ciphers were preserved for the 8-bit variants: complete diffusion in a single round; MA-boxes alternating modular addition and multiplication; asymmetric key-mixing layers for odd and even rounds; new key schedule algorithms with fast key avalanche; the same computational framework holds for encryption and decryption. Preliminary Square and algebraic attack results are described, and resistance to other modern cryptanalytic techniques is also expected.
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Júnior, J.N. (2004). Faster Variants of the MESH Block Ciphers. In: Canteaut, A., Viswanathan, K. (eds) Progress in Cryptology - INDOCRYPT 2004. INDOCRYPT 2004. Lecture Notes in Computer Science, vol 3348. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-30556-9_14
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DOI: https://doi.org/10.1007/978-3-540-30556-9_14
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