Lisitzky, Konstantin, and Katerina Kuznetsova. “On the Weakness S of the Transformation of the Cipher Strumok from the Chain of Controllable S-Blocks”. Computer Science and Cybersecurity0, no. 4 (January 13, 2019): 13-21. Accessed November 21, 2024. https://periodicals.karazin.ua/cscs/article/view/12248.