Sahun, A., Khaidurov, V., Lakhno, V., Opirskyy, I., Chubaievskyi, V., Kryvoruchko, O. and Desiatko, A. (2021) “Devising a method for improving crypto resistance of the symmetric block cryptosystem RC5 using nonlinear shift functions”, Eastern-European Journal of Enterprise Technologies, 5(9 (113), pp. 17–29. doi: 10.15587/1729-4061.2021.240344.