A Comparative Analysis of Information Hiding Techniques for Copyright Protection of Text Documents

Table 12

Implementation of structural techniques on highlight examples.

Algorithm	Original text	Watermarked text	Embedded bits
Bender et al., 1996 [44]	Tom’s leg is injured by falling.	Tom’s leg is injured by falling.	5
Lee and Tsai, 2008 [42]	Tom’s leg is injured by falling.	Tom’s leg is &#x32injured by &#160falling.	15
Cheng et al., 2010 [45]			12
Chou et al., 2012 [46]	Tom’s leg is injured by falling.	Tom’s leg is injured by falling.	25
Gutub et al., 2010 [47]			12
Por et al., 2012 [22]	Tom’s leg is injured by falling.		10
Taleby Ahvanooey and Tabasi, 2014 [15]	Tom’s leg is injured by falling.	Tom’s leg is injured by falling.	4
Taleby Ahvanooey et al., 2015 [16]	Tom’s leg is injured by falling.	Tom᠎’s leg is injured by falling.	32
Taleby Ahvanooey et al., 2016 [11]	Tom’s leg is injured by falling.	Tom’s leg is injured by falling.	Total bits of watermark
Alotaibi and Elrefaei, 2016 [19]	Tom’s leg is injured by falling.		20
Rizzo et al., 2016 [29]; Rizzo et al., 2017 [48]	All the world		10