Repo contains implementation of RSA cipher, Elegmal cipher and RSA signature in CPP Character mapping is as follows: {'0', 0}, {'1', 1}, {'2', 2}, {'3', 3}, {'4', 4}, {'5', 5}, {'6', 6}, {'7', 7}, {'8', 8}, {'9', 9}, {' ', 10}, {'a', 11}, {'b', 12}, {'c', 13}, {'d', 14}, {'e', 15}, {'f', 16}, {'g', 17}, {'h', 18}, {'i', 19}, {'j', 20}, {'k', 21}, {'l', 22}, {'m', 23}, {'n', 24}, {'o', 25}, {'p', 26}, {'q', 27}, {'r', 28}, {'s', 29}, {'t', 30}, {'u', 31}, {'v', 32}, {'w', 33}, {'x', 34}, {'y', 35}, {'z', 36}