El Gamal Algorithm: A public key cryptosystem based on the Diffie-Hellman key exchange. It was developed by Taher ElGamal in 1985 and is used for digital signatures, key agreements, and encryption. The El Gamal encryption system is an alternative to the RSA algorithm and relies on the difficulty of calculating discrete logarithms for providing security. It has the property that each plaintext message is encrypted to a different ciphertext message using a randomly chosen parameter, even if the same plaintext message is encrypted multiple times.
Categories: CC D5: Security Operations | CCSP D2: Cloud Data Security | CISM D3: Information Security Program | CISSP D3: Security Architecture and Engineering | Security+ D1: General Security Concepts | SSCP D5: Cryptography
« Back to Glossary Index