ElGamal [here]

ElGamal Encryption with Elliptic Curves

Towards partial homomorphic encryption with elliptic curves

I think if John Napier were alive today he would wonder at how discrete logarithms have been used to secure our world. And, I am also sure he would strike up an immediate bond with Taher Elgamal and who, in 1985, published this classic paper [here]: