r Elgamal Encryption Calculator, some basic calculation examples on the process to encrypt and then decrypt using the elgamal cryption technique as well as an example of elgamal exponention encryption/decryption. The complete source for this application is available on GitHub. The ElGamal signature scheme is a digital signature scheme which is based on the difficulty of computing discrete logarithms.It was described by Taher Elgamal in 1985.. Generate a random number K where (K