A Review Paper of Dual Steganography Technique Using Status LSB and DWT Algorithms Manisha #1 #1 M Tech Scholar, Dept. of Computer Science & Engineering BSAITM, M.D.U. Rohtak Faridabad, India #1 mittalmanisha1301@gmail.com Deepkiran Munjal *2 *2 Assistant Professor, Dept. of Computer Science & Engineering BSAITM, M.D.U. Rohtak Faridabad, India *2 deepkiran.munjal@faculty.anangpuria.com Abstract-In this paper the focus is on maintaining secrecy between two communication parties using dual steganography technique. In dual steganography secret message is first embedded in to cover image by using LSB (Least Significant Bits) algorithm and then resulted embedded image will be again embedded in to another cover image by using DWT (Discrete Wavelets Transform) algorithm to form Stego-image. The DWT (Discrete Wavelets Transform) algorithm is found to be better in the terms of efficiency, robustness, highly security and embedding capacity. With rapid growth of World Wide Web and advance computer network, we need security, privacy, integrity and authentication in the data communication. A steganography is art of hiding sensitive information in another cover medium. The main objective of this paper is to achieve embedding capacity, quality and secure communication. Keywords-Dual Steganography ; Image Steganography; Status LSB; DWT. I. INTRODUCTION In today’s world the data communication is the basic need of every growing area. Each and every person wants a robust, secure and high capacity steganography technique for maintaining secrecy and safety of their communicating data. The organizations such as internet banking, e-commerce, diplomacy and medicine, private communications are essential .Thus it has increased the need of storing large amounts of data and their security. In order to share the information in secret manner two techniques could be used which are cryptography and steganography. In cryptography the message is converted into encrypted form of the help of encryption key which is known to sender and receiver only. However, the transmission of encrypted message is not safe because the encrypted message may easily arouse attacker‘s suspicion and may be intercepted or attacked easily. In order to remove these short comings of cryptographic techniques, steganography techniques have been developed. Steganography is defined as the technique that deals with the study of secure and secret communication. “Steganography” is a Greek word which means “hiding writing”. Steganography word is the combination of two parts: Steganos which means “secret” and Graphic which means “writing”. Steganography is defined as the process of hiding sensitive information on any multimedia cover like image, audio, video and protocol etc in a such way that unauthorized person can’t be recognized the existing of sensitive information in to the cover media. The data that to be hidden is called Stego and the cover media in which data to be hidden is called host. The main different between in cryptography and steganography is ,cryptography protect the contents of the message while steganography hides the fact that a secret message is being sent as well as to hide the contents of the message. Dual steganography is the security mechanism in which steganography and cryptography are used together. To achieve the goal of high security use the new version of dual steganography using the two LSB (Least Significant Bits) algorithm and DWT (Discrete Wavelets Transform) algorithm together. In this new version of dual steganography uses steganography within steganography. In this secret data is embedded in cover image using the Manisha et al. / International Journal of Computer Science & Engineering Technology (IJCSET) ISSN : 2229-3345 Vol. 7 No. 05 May 2016 233