Effect of Noise on image steganography based on LSB insertion and RSA encryption

Abstract

This project simulates an effective data hiding technique i.e. steganography based on LSB insertion and RSA encryption in order to provide seven million times better security about hidden data ,than the previous work. The Main idea of proposed scheme is to encrypt secret data by RSA 1024 algorithm, convert it in to binary sequence bit and then embedded into each cover pixels by modifying the least significant bits (LSBs) of cover pixels. The result image is known as steganography image. Steganalysis is the method used by attackers to determine if images have hidden data and to recover that data. In this paper the images names are Baboon, Lena ,Boat are used for experimental purpose. The PSNR value of this steganography image is 54.34 db. 53.32 db,52.55 db respectively..This steganography image is transmitted through AWGN channel, and effects of noises are simulated. The image and hidden data are reconstructed with the SNR level ≥9 dB. The steganography method proposed in this paper is superior to that used by current steganography tools.Beceause by matching data to an image, there is less chance of an attacker being able to use steganalysis to recover the data and Before hiding the data in an image the application first encrypts in it.