Today, transferring sensitive information via secure methods and protecting information privacy are becoming critically important, the two ways for securing and transferring messages and data are cryptography and steganography. Steganography is used for hiding messages in innocuous media (carriers) such as text, image, audio, video and protocol. Amongst these different carriers, digital images are the most popular because of their frequency on the internet. To be more robust in security, steganography can be combined with cryptographic techniques. In this paper, we propose Secure Data Transfer using RSA and Steganography in order to obtain a secure system. The system will be implemented by Java programming language.