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Elliptic Curve Cryptography (ECC) was co-invented by Neal Koblitz and Victor Miller and scaled our discrete log method (g^x) into a multiplicative space (x.G). So the DH (Diffie-Hellman) key exchange method became ECDH and DSA (Digital Signature Algorithm) become ECDSA, and with a tweak, we can also encrypt with ECIES.
Some links on background theory and practice are:
asecuritysite.com/ecc
asecuritysite.com/ecdsa
asecuritysite.com/eddsa
asecuritysite.com/ecies