MAC Authentication for Compressed Image Using Diffie-Hellman Key Exchange Algorithm

MAC Authentication for Compressed Image Using Diffie-Hellman Key Exchange Algorithm
Authors:S. KIRAN, B. LAKSHMI NARAYANA REDDY

Abstract: Image authentication is a process to indicate its authenticity and origin of the image. In this paper we propose image compression with image content authentication. From our experimental results, the technology provides a unique signature for every processed image. We can use the unique signature to confirm if the image is modified easily with image compression technique. 

Keywords: Authentication, Compression, Signature, Cryptography, Protection.

I. INTRODUCTION 

     Digital Images  have been widely used in many areas such as military, government sectors, hospitals, forensic science etc. If the modification or duplication is unauthorized then it is illegal. The Image digest is encrypted using such cryptographic techniques  as public-key encryption 

A. Problems with Image Authentication 

    The excelling technology of today’s world highresolution image editing tools has made altering images very simple. In many cases alterations don’t leave any clues that the image has been altered. All image authentication techniques are sorted into two types: Watermarking and Digital Signature scheme[13][14], each scheme has its own advantages and disadvantages. Manipulation technique amenable to analysis involves primarily alteration and composition. Altering is the changing of the image features through the use of artistic means [6][11], the example shown in Figure 1.

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