A Text Watermark Embedding and Extraction Method Based on Semantic Role Position Mapping

Abstract

The present invention relates to a text watermark embedding and extraction method based on semantic role position mapping. The embedding method includes the following steps: 1) preprocessing the watermark information, converting the watermark characters into an information string composed of code elements; 2) through natural language processing The technology finds out the semantic role in the text, obtains the position information of the semantic role, and corresponds the semantic role type with the code element representing the watermark information one by one; 3) Takes out the codewords in the watermark information string one by one, and compares the codeword with the corresponding A location of the semantic role of the type is mapped to complete the embedding of the watermark. The extraction method includes: according to the position information of the semantic role obtained when embedding the watermark, find the semantic role of the position in the text, and then reversely map to obtain the watermark information string represented by the code element, and finally convert it into the original watermark information. The above method does not make any changes to the text format and content, has good concealment and robustness, and can effectively resist various common format transformations and attacks.

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...

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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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