Elliptic curve cryptosystem ElGamal encryption and transmission scheme

ElGamal algorithm is a well-known and important cryptosystem. Elliptic curve algori- thm became a hotspot in cryptography community, because of its safety, efficiency and low comp- lexity. Based on elliptic curve cryptography, combined elliptic curves cryptosystem and ElGa- mal algorithm, ECC ElGamal encryption algori- thm will be improved and its feasibility and secu- rity will be analyzed. Finally, according to threshold cryptography systems thinking, two secure data transmission schemes be shown about ECC ElGamal cryptosystem.