ENCRYPTING UNIT Russian patent published in 1999 - IPC

FIELD: communication devices, computer engineering, in particular, cryptography. SUBSTANCE: device has W n-bit operation units, which are connected in series (W is not less than 2, n is even integer). Some operation units are designed as adders, others as permutation calculation units. Input of first operation unit serves as information input of device, which output is output of W-th operation unit. One of control inputs is another input of each adder. In addition at least one permutation calculation unit is designed as controlled permutation unit, which control input is connected to either one input of an adder or input of first operation unit. EFFECT: increased reliability of ENCRYPTING. 4 cl, 10 dwg