Development of an import–substituting software package for secure file transfer, based on the modified protocol of EL–GAMALLarisa Cherckesova, Olga Safaryan, Nikolay Boldyrikhin, Boris Akishin and Vasiliy YukhnovE3S Web Conf., 273 (2021) 08049DOI: https://doi.org/10.1051/e3sconf/202127308049