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| Recoverable Watermarking Algorithm for Text Authentication and Synonym Replacement Based on Hopfield Neural Network |
| WANG Jing1, TANG Xiang-Hong1,2, LIN Xin-Jian1 |
1.School of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310018
2.School of Information Engineering, Hangzhou Dianzi University, Hangzhou 310018 |
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Abstract Aiming at problems of tamper detection and recovery, a recoverable watermarking algorithm for text authentication and synonym replacement based on synonym replacement technology and associative memory function of Hopfield neural network is proposed. The text is divided into replaceable synonyms and non-replaceable words. The feature information of replaceable synonyms is extracted according to the position in their thesaurus and the feature information of non-replaceable words is extracted according to the structure and stroke of Chinese characters in the text. Then, the watermark is embedded by synonym replacement. The information of watermark and the feature information of non-replaceable words are input into the Hopfield neural network and they are trained to realize tamper detection and recovery function of replaceable synonyms. The simulation results show that the proposed algorithm has good robustness, tamper detection performance and recoverability, and by this algorithm, tamper detection and the location of replaceable synonyms and non-replaceable words are implemented to realize text authentication, recover the original replaceable synonyms and achieve recovery.
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Received: 13 June 2013
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2015, Vol. 28 
