Combining Jpeg Steganography and Substitution Encryption for Secure Data Communication

The Internet is a method of communication to distribute information to the masses. Digital image are excellent carriers for hidden information. Steganography and cryptography are technologies that are used for secret and secured communications. In both the methods, secret message is exchanged between two groups, sender and receiver. The main purpose in cryptography is to make massage concept unintelligible, while steganography aims to hide secret message. The authors propose a method of combining steganography, cryptography for secret data communication. In this paper, they propose a high-performance JPEG steganography along with a substitution encryption methodology.