Image Steganography Based on Complemented Message and Inverted Bit LSB Substitution

Abstract

Steganography is the art of encoding/embedding secret information in cover media in such a way so as not to provoke an eavesdropper's suspicion. The primary purpose of this paper is to provide three levels of security, first is provided by complementing the secret message, second by hiding complemented secret message in cover image pixels that are selected randomly by using pseudo random number generator, third by using inverted bit LSB method2 as stegnographic technique rather than simple LSB, thus, reduces the chance of the hidden message being detected. MSE (Mean Square Error) and PSNR (Peak Signal to Noise Ratio) are two common quality measurements to measure the difference between the cover-image and the stego-image. Results showed that the proposed method gives better results than simple LSB and inverted LSB with higher PSNR and lower MSE.