An active attack on chaotic based text zero-watermarking

Without modified cover text, zero-watermarking technology makes steganalysis technology is completely ineffective. However, as far as the resilient of active attack, there´s no deep study currently. In this paper, the text zero-watermarking algorithm based on chaotic map, which has a better robustness, is regarded as the attack target. By synonym substitution, two kinds of attack methods: Sync-attack and Birthday-attack has been determined. Then a text watermark algorithm for lexical active attack was proposed by combining the two methods. Experiments show that the algorithm can effectively destroy the zero-watermark without massive rewrite texts.