TY - JFULL AU - Jalil Z. and Farooq M. and Zafar H. and Sabir M. and Ashraf E. PY - 2010/11/ TI - Improved Zero Text Watermarking Algorithm against Meaning Preserving Attacks T2 - International Journal of Computer and Information Engineering SP - 1533 EP - 1538 VL - 4 SN - 1307-6892 UR - https://publications.waset.org/pdf/9037 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 46, 2010 N2 - Internet is largely composed of textual contents and a huge volume of digital contents gets floated over the Internet daily. The ease of information sharing and re-production has made it difficult to preserve author-s copyright. Digital watermarking came up as a solution for copyright protection of plain text problem after 1993. In this paper, we propose a zero text watermarking algorithm based on occurrence frequency of non-vowel ASCII characters and words for copyright protection of plain text. The embedding algorithm makes use of frequency non-vowel ASCII characters and words to generate a specialized author key. The extraction algorithm uses this key to extract watermark, hence identify the original copyright owner. Experimental results illustrate the effectiveness of the proposed algorithm on text encountering meaning preserving attacks performed by five independent attackers. ER -