TY JOUR TI MODELS OF RANDOM SYSTEMS WITH CONTROLLED SYMMETRY IN STREAM ENCRYPTION KW random system KW memristor KW enciphering KW controlled symmetry KW semi-non-evident integration JO Bulletin of Bryansk state technical university AU Butusov, D.N. AU Tutueva, A.V. AU Karimov, A.I. AU Karimov, T.I. PY 2019 IS 2019 PB Bryansk State Technical University