NESTING OF FIVE MODULUS METHOD WITH IMPROVED LSB SUBTITUTION TO HIDE AN IMAGE IN IMAGE

Abstract

Steganography refers to the process of hiding secret message inside an appropriate multimedia carrier e.g. image, audio and video files. Today, by using of wireless communication more data are available electronically, which can leak from the medium where the data transmission takes place. The goal of steganography is to communicate very securely, which is completely undetectable from the medium. In this paper image steganography has used, where a secret image can transfer within an image called cover image. To hide a secret image in cover image, both the images embedded by using two techniques. The first algorithm called five modulus methods applied on the half of the both images (Secret and Cover Image) and rest of the parts of images embedded with improved LSB substitution technique. A private stego-key is also used on half parts of both images while applying FMM algorithms to make the detection of secret image from the cover image more difficult for any unauthorized recipients. The paper uses two algorithms for embedding the both secret and cover images, so for nesting of two algorithms make it difficult for any opponent (who has not involved in communication parties) to extract the hidden image from cover image.