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2. Stallings, W.: ‘Cryptography and network security: principles and practice’, (Prentice Hall 2002),3rd
3. Communication Theory of Secrecy Systems*
4. Substitution-permutation networks resistant to differential and linear cryptanalysis
5. MacWilliams, F., and Sloane, N.: ‘The theory of error-correcting codes’, (North-Holland, Amsterdam 1977)