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  5. About network of IDEA2M–m, consisting of m round of functions and its modification

About network of IDEA2M–m, consisting of m round of functions and its modification

G.N. Tuychiev
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In the article on the basis of chart Lay-Messi networks, consisting of 2m subblocks, are developed. In the developed networks, like the network of Feystelya, for encoding and decryption a the same algorithm is used and as round functions it is possible to utillize any transformations. On the basis of it in the developed networks it is possible to build the algorithm of block encryption of block of 64m length beaten at length of subblock, equal to 32 bats, beaten block of 32m length at length of subblock, equal to 16 bats and beaten block of 16m length at length of subblock, equal to 8 bats.
Keywords: network of Feystelya, chart of Lay–Messi, encoding, decryptions, algorithm of block encryption, round, round function, round keys, output transformation, block, subblock, increases on the module, additions on the module, multiplicative inversion, additive inversion