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.[1]
The ElGamal signature algorithm is rarely used in practice. A variant developed at the NSA and known as the Digital Signature Algorithm is much more widely used. There are several other variants.[2] The ElGamal signature scheme must not be confused with ElGamal encryption which was also invented by Taher Elgamal.
^Taher ElGamal (1985). "A Public-Key Cryptosystem and a Signature Scheme Based on Discrete Logarithms" (PDF). IEEE Transactions on Information Theory. 31 (4): 469–472. CiteSeerX 10.1.1.476.4791. doi:10.1109/TIT.1985.1057074. S2CID 2973271. (conference version appeared in CRYPTO'84, pp. 10–18)
^K. Nyberg, R. A. Rueppel (1996). "Message recovery for signature schemes based on the discrete logarithm problem". Designs, Codes and Cryptography. 7 (1–2): 61–81. doi:10.1007/BF00125076. S2CID 123533321.
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