Kalashnikov VV, Avramenko VV, Kalashnykova NI, Kalashnikov VV. A Cryptosystem Based Upon Sums of Key Functions. Int. Journal of COP and Infor. [Internet]. 2018 Jan. 8 [cited 2024 Apr. 18];8(1):31-8. Available from: https://ijcopi.org/ojs/article/view/5