A Comparative Study on Reversible Data Hiding in Encrypted Images Using Various Frameworks

	International Journal of Computer & Organization Trends  (IJCOT)
	© 2017 by IJCOT Journal
	Volume - 7 Issue - 5
	Year of Publication : 2017
	Authors : Sayeesh, Manjunath Kotari, Harish Kunder, Chanchal Antony

Sayeesh, Manjunath Kotari, Harish Kunder, Chanchal Antony "A Comparative Study on Reversible Data Hiding in Encrypted Images Using Various Frameworks", International Journal of Computer & organization Trends (IJCOT), V7(5):14-18 Sep - Oct 2017, ISSN:2249-2593, www.ijcotjournal.org. Published by Seventh Sense Research Group.

AbstractWe need more security for data transmission in computer networks. Nowadays most popularly we store and manage variety of data in cloud server. We need to protect the privacy of the data that is stored in cloud server. Many robust message encryption methods have been developed to such methods. Reversible data hiding in encrypted images is form of steganography in which we hide data within images. In this paper, we compare vacating room after encryption (VRAE), reserving room before encryption (RRBE) and reversible image transformation (RIT) frameworks for reversible data hiding in encrypted images. In the framework VRAE, the cloud server embeds data by losslessly vacating room from the encrypted images by using the idea of compressing encrypted images. In the framework RRBE, the image owner first empties out room by using reversible data hiding method in the plain images. After that, the image is encrypted and outsourced to the cloud and the cloud server can freely embed data into the reserved room of the encrypted image. RIT-based framework allows the user to transform the content of original image into the content of another target image with the same size. The transformed image, which looks like the target image, is used as the encrypted image and is outsourced to the cloud.

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Keywords-
Reversible data hiding (RDH), vacating room after encryption (VRAE), reserving room before encryption (RRBE), reversible image transformation (RIT), image encryption, privacy protection.