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The Scientific World Journal
Volume 2014, Article ID 803983, 29 pages
http://dx.doi.org/10.1155/2014/803983
Research Article

Two-Layer Fragile Watermarking Method Secured with Chaotic Map for Authentication of Digital Holy Quran

1Center of Excellence Information Assurance, King Saud University, P.O. Box 92144, Riyadh 11653, Saudi Arabia
2IT Research Center for the Holy Quran and Its Sciences (NOOR), Taibah University, Madinah 41477, Saudi Arabia
3Department of Computer Science, College of Computer Science and Engineering, Taibah University, Madinah 41477, Saudi Arabia

Received 31 October 2013; Accepted 20 February 2014; Published 29 May 2014

Academic Editors: J.-H. Park and Y. Pan

Copyright © 2014 Mohammed S. Khalil et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a novel watermarking method to facilitate the authentication and detection of the image forgery on the Quran images. Two layers of embedding scheme on wavelet and spatial domain are introduced to enhance the sensitivity of fragile watermarking and defend the attacks. Discrete wavelet transforms are applied to decompose the host image into wavelet prior to embedding the watermark in the wavelet domain. The watermarked wavelet coefficient is inverted back to spatial domain then the least significant bits is utilized to hide another watermark. A chaotic map is utilized to blur the watermark to make it secure against the local attack. The proposed method allows high watermark payloads, while preserving good image quality. Experiment results confirm that the proposed methods are fragile and have superior tampering detection even though the tampered area is very small.