Embedding method and extracting method for text watermark based on semantic role position mapping

Abstract

The invention relates to an embedding method and an extracting method for a text watermark based on semantic role position mapping. The embedding method comprises the following steps: 1) preprocessing the watermark information and converting a watermark character into code elements and forming an information string; 2) utilizing a natural language processing technique to search for the semantic role in the text, thereby acquiring the position information of the semantic role, and causing the semantic role category to be corresponding to the code elements one by one; 3) taking out the codes from the information string of the watermark one by one, mapping the codes to the position corresponding to the category of the semantic role, thereby finishing the embedding of the watermark. The extracting method comprises the following steps: searching for the semantic role on the position in the text according to the position information of the semantic role which is acquired during the process of watermark embedding; reversely mapping, thereby acquiring the information string of the watermark expressed by the code elements; lastly, converting the information string into the original watermark information. According to the method provided by the invention, the text format and content are free from any alteration, the hidden property and the robustness are excellent, and various conventional format conversions and attacks can be effectively resisted.

Description

technical field [0001] The invention relates to watermark embedding and extraction technology, in particular to a text watermark embedding and extraction method based on semantic role position mapping. Background technique [0002] With the popularization and application of the Internet and information technology, more and more text information is published, disseminated and used in digital form. While it brings convenience to people's study, work and life, it also produces texts that are easy to be illegal. The protection of intellectual property rights of digital texts has attracted widespread attention in the industry due to problems such as copying and misappropriation. Text watermarking is a technology that has emerged in recent years to protect the intellectual property rights of digital texts. It embeds copyright identification information or identity authentication information (watermarks) in digital texts in a certain way. Extract these information to prove the cop...

AI Technical Summary

Problems solved by technology

However, due to the complexity of the Chinese language, synonym replacement and syntactic transformation may cause ambiguity or change semantics, and it is not suitable for situations where the text content should not be changed

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