Blind image Steganalysis of interpolation error based data hiding in stereo images J.Hemalatha 1 Computer Science and Engineering Thiagarajar College of Engineering Tamilnadu, India jhemalathakumar@gmail.com Dr.M.K.KavithaDevi 2 Computer Science and Engineering Thiagarajar College of Engineering Tamilnadu, India mkkdit@tce.edu MayaMohan 3 Department of CS&E NSSCE Palakkad, Kerela, India mayajeevan@gmail.com Abstract- The technique of hiding the data in the interpolation error based on histogram shifting mechanism and pixel difference expansion in the stereo image. The embedding secret data into interpolation error has high payload and low distortion. In this paper propose a steganalysis scheme based on histogram deviation in the interpolation error of an image. In particular the statistical feature that are extracted from the subsample image of interpolation error. To improve the accuracy of detection rate, support vector machine used as classifier. The experimental result shows that the proposed steganalysis scheme has better accuracy in detection the stego images. Index Terms- Steganography, steganalysis, interpolation error. I. INRODUCTION Steganography is the system of hiding undisclosed information into an innocuous-looking cover medium to conceal the information existence. The main goal of Steganography is that except information senders and receivers no one can aware about the existence of secret data. It meets both legal as well as illegal interests. For instance, civilians, bankers, may use for protecting confidentiality and terrorists may use for spreading terroristic information. Basically undisclosed information can be hiding in domains such as audio, video, text and image. For hiding the message in the innocuous-looking cover medium the mono image or stereo image is select as a cover image. Then by using the steganography tool that are available as a online tool or by the new pioneering capricious technique the message can be hide within the cover medium by the help of key(can be added for security). The basic Steganography technique is shown in figure 1. With the advantage of capricious technique, terrorists use this art for sending their destructive messages throughout the world with the help of internet. Secret key (k) Fig.1 Basic block diagram of Steganography II EXISTING SOLUTIONS 1) Steganography In digital Steganography reversible data hiding provides more robust when hiding the payload message. This reversible data hiding methods used in application such as defense, medical, astronomical images etc. The reason behind using reversible data hiding is that the cover image can be restored again from a stego image once extracting the hidden message. Higher payload has been achieved in this reversible data hiding. The technique behind the interpolation error based data hiding is that (Luo et al.2010) [1] by using the interpolation error, the secret data can be embed rather than the prediction error or inter pixel difference. This achieved by combines the histogram shifting technique and difference expansion. Tian et al. [2] proposed the difference expansion performed by addition rather than bit stream or bit shifting. The main problem of difference expansion is that after embedding the data, some pixel pairs may overflow or underflow. Hence it cannot be used for data embedding. Cover medium Message m Encryption system Steganography algorithm Secret message Stego medium International Journal of Applied Engineering Research, ISSN 0973-4562 Vol. 10 No.20 (2015) © Research India Publications; http://www.ripublication.com/ijaer.htm 16848