@book{Kramarov2017cryptographic,
author={Kramarov, S.O. and Mityasova, O.Y. and Sokolov, S.V. and Tischenko, E.N. and Shevchuk, P.S.},
title={Cryptographic protection of information},
publisher={Publishing Center RIOR},
year={2017},
pages={321},
}