The article focuses on a study of the procedures of permutations in symmetric ciphers with Feistel network structure (SF) to improve the performance of mixing the Shannon. Namely, the possibility of improving performance by stirring using a permutation several cycles and addition operations in the factor ring Z / (q). The analysis of the most suitable from the point of view of the diffusion process structure Feistel scheme and investigate the feasibility of using a scheme of exchange (CO) symmetric cipher cycle operations of addition.
symmetrical encryption Feistel network, the circuit exchange, diffusion
"Analyz pokazatelei peremeshyvanyia v setiakh Feistelia" [Analysis of mixing in networks Feistel],
Information Processing Systems,