Hindawi Security and Communication Networks Volume 2018, Article ID 5325040, 22 pages https://doi.org/10.1155/2018/5325040 Review Article A Comparative Analysis of Information Hiding Techniques for Copyright Protection of Text Documents Milad Taleby Ahvanooey ,1 Qianmu Li ,1 Hiuk Jae Shim,2 and Yanyan Huang3 1 School of Computer Science and Engineering, Nanjing University of Science and Technology, Nanjing, China 2School of Computer and Sofware, Nanjing University of Information Science and Technology, Nanjing, China 3School of Automation, Nanjing University of Science and Technology, Nanjing, China Correspondence should be addressed to Milad Taleby Ahvanooey;
[email protected] and Qianmu Li;
[email protected] Received 6 October 2017; Revised 28 December 2017; Accepted 16 January 2018; Published 17 April 2018 Academic Editor: Pino Caballero-Gil Copyright © 2018 Milad Taleby Ahvanooey et al. Tis 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. With the ceaseless usage of web and other online services, it has turned out that copying, sharing, and transmitting digital media over the Internet are amazingly simple. Since the text is one of the main available data sources and most widely used digital media on the Internet, the signifcant part of websites, books, articles, daily papers, and so on is just the plain text. Terefore, copyrights protection of plain texts is still a remaining issue that must be improved in order to provide proof of ownership and obtain the desired accuracy. During the last decade, digital watermarking and steganography techniques have been used as alternatives to prevent tampering, distortion, and media forgery and also to protect both copyright and authentication.