FIELD: cryptographic conversions. SUBSTANCE: device has n-bit key register 1, m=bit information register 2, first, second, third 8-bit modulo 28 adders 3,5,8, 8-bit functional f converter unit 4, 8-bit functional g converter unit 6, 8-bit modulo-2 adder 7. Device provides for adapting design parameters to actual conditions. User can choose desired switch length, coded unit length, number of information processing cycles, including functional conversions. EFFECT: enlarged functional capabilities. 3 dwg, 3 tbl
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