A RSA- DWT Based Visual Cryptographic Steganogrphy Technique

Abstract

With the development of science, digital media can be transmitted conveniently over the internet. The security of the data is essential issue for the internet. The security of information can be achieved by cryptography and steganography. Cryptography scrambles the data to hides the contents of message. Steganography hides the existence of message by embedding data in some other digital media like image or audio files. The paper proposes a security method which uses both encryption and data hiding. In proposed system data is firstly encrypted using RSA encryption algorithm and then embedded in an image using Haar-DWT based steganographic method. The experimental result shows that proposed system has better PSNR value and high capacity in comparison to other techniques like LSB and LSB-DCT steganography.