ElGamal algorithm for encryption of data transmission

With continuous development of network technology, more and more attacks on system from Internet have become more automated and caused greater damage and loss. It is important to improve network security and protect transmission information. General speaking, it is able to protect information, to some extent, with file encryption and digital signature. This article explores ElGamal public key encryption algorithm that is put practice into information transmission. Base on it, it also aims to achieve the text encryption and decryption, image encryption and decryption so as to guarantee information transmission.