Dang, Thuong, Tuan Nguyen, and Tran Ngo. “From Semigroup Action to Homomorphic Encryption and Some Related Problems in Cryptography”. Journal of Science and Technology Development 18, no. 3 (August 30, 2015): 254-259. Accessed June 14, 2025. https://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/842.