Stegnalytic Method using Matching Keys

Abstract

Steganography is the art of hiding information imperceptibly in a cover medium. The main aim in the steganography is to hide the very existence message in the covered medium. Today digital technology and internet provide for easy to use cover media for steganography. In order to improve the security for data by providing stego Image. The proposed method describes two steps for hiding the secret information by using the steganography based on matching method. The first step is to find the shared stego-key between the two communication parties over insecure networks by applying Diffie Hellman Key exchange protocol. The second step in the proposed method is that the sender uses the secret stego-key to select pixels that it will be used to hide. Each selected pixel is then used to hide 8 bits binary information depending on the matching method.