Image Steganography Using a Dynamic Symmetric Key

Steganography is the art of concealing one digital media within another digital media and retrieving the information afterwards. There are many examples of usage: image into image, text into image, video into voice, voice into video, etc. This paper concentrates on a method used for hiding text into image using Least Significant Bit (LSB), and using a symmetric key between sender and receiver to choose which bits are needed to be embeded the text to minimize the resolution between the original image and the stego-image. Further this paper also explains about the security issues to the stego-image. Also the comparision of the performance of the algorithms (PSNR) have been discussed.

1. Introduction

Nowadays, information security is a very sensitive case of security and it has become necessary to protect data and information and to prevent these from being tampered. This protection is given when the data is already in its place or during transmission of data.