Data Embedding Approach For Message Authentication System

The demand for effective information security schemes is increasing day by day with the exponential growth of internet. Therefore, cryptographic algorithms are widely used in many research areas to fulfill the security requirements. Among the security requirements, message authentication plays an important role to prevent message alternation and modification from unauthorized party. Due to attack made on Today’s data communication, effective steganographic techniques are also developed using various carriers such as image, audio, video, etc. So, this work proposes security system by integrating cryptographic one-way hash function (SHA-512) and image steganographic approach to meet confidentiality and message authentication requirements. The basic idea behind this paper is to provide a good embedding method based on Pixel Mapping Method (PMM) for data hiding in image to achieve better embedding capacity with minimum degradation of image quality. The performance analysis of proposed embedding approach and PMM is made according to the comparative study of embedding capacity and Peak Signal to Noise Ratio (PSNR) values.