FIELD: cryptographic transforms; communication, computing, and data-processing systems for making binary data private. SUBSTANCE: device has np-bit key register 1, mp-bit data register 2, first, second, third, and fourth adders 3,5,7,9, f,q,h p-bit transform blocks 4,6,8. EFFECT: provision for data encryption by blocks of different length using key of length making impossible its trial within reasonable time. 3 cl, 1 dwg
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