Nowadays, with the growth of technology, security is an important issue in communication. In many applications, the transmission of data (massage, image and so on) is needed to provide security against from preventing unauthorized users. Cryptography is a technique that provides secure communication. The two widely accepted and used cryptographic methods are symmetric and asymmetric. There are so many different techniques that should be used to protect confidential image data from unauthorized access. This system provides secure image transmission between the sender and receiver. This system uses Optimal Asymmetric Encryption Padding (OAEP) with an RSA encryption algorithm to provide security during transmission. Only public key cryptography is focused here. The public-key cryptographic algorithm relies on one key for encryption and a different but related key for decryption. In this system, different image formats (jpg, png, gif, and bmp) are used to test for encryption and decryption processes.