A Simple Steganography Algorithm Based on Lossless Compression Technique in WSN

R Vijayarajeswari,J Santhosh,A Rajivkannan

doi:10.4236/cs.2016.78117

Abstract

Image security has wide applications in data transferring from source to destination system. However, cryptography is a data secrecy technique between sender and receiver, the steganography increases the level of security and acts a protective layer to the hidden information within the source image. In this paper, a compression scheme based image security algorithm for wireless sensor network is proposed to hide a secret color image within the source color image. The main contribution of this paper is to propose a compression scheme which is based on level matrix and integer matrix, and increases the compression level significantly. The performance of the proposed system is evaluated in terms of peak signal to noise ratio (PSNR), mean square error (MSE), number of pixels change rate (NPCR) and unified average changing intensity (UACI). The proposed method achieves 42.65% PSNR, 27.16% MSE, 99.9% NPCR and 30.99% UACI.

Highlights

Nowadays, lots of information is exchanged through the internet
One of the foremost variations of steganography with cryptography is that encoding the traffic, the communications will be secured but people become aware of the existence of message by observing coded information, they are not able to realize the message in the data
The performance of the proposed system is evaluated in terms of Peak Signal to Noise Ratio (PSNR), Mean Square Error (MSE), Number of Pixels Change Rate (NPCR) and Unified Average Changing Intensity (UACI) that are described in Biswas et al (2015)

Summary

Introduction

Lots of information is exchanged through the internet. Security of the information plays an important role in internet to protect the data from the attackers or intruders. Many researchers are using cryptography and steganography for data security over the internet medium. Cryptography deals message encryption but the communication is visible but on the other hand, steganography deals with secret message hiding but the communication is not visible [1]. One of the foremost variations of steganography with cryptography is that encoding the traffic, the communications will be secured but people become aware of the existence of message by observing coded information, they are not able to realize the message in the data.

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Conclusion