一种基于声调特征映射的无载体信息隐藏方法

Coverless Text Steganography Method Based on Tone Feature Mapping

搜索式无载体信息隐藏方法无需修改载体即可嵌入秘密信息,可有效维持秘密信息的不可感知特性,但算法性能极度依赖文本大数据集。基于此,提出一种基于声调特征映射的文本无载体信息隐藏方法。该方法通过声调特征编码获取文本的特征序列,利用特征匹配与指定匹配算法构建文本与秘密信息的映射关系,直接从文本集中检索符合映射关系的文本并发送,以此实现秘密信息的隐蔽传输。实验结果表明,所提方法在小规模文本集条件下性能稳定,显著降低了搜索式无载体信息隐藏方法对文本大数据集的依赖。

The search-based coverless steganography methods can effectively resist the potential steganalysis attacks while their performance relies heavily on large text data sets.To address this problem,this paper proposes a coverless steganography method based on tone feature mapping.In this method,the communicating parties obtain the feature sequence of text through character feature encoding,construct the mapping relationship between texts and secret information using feature matching and specified matching algorithm,retrieve the stego texts so as to realize the covert transmission of secret information.The experimental results show that the proposed method can significantly reduce the dependence on large text data sets.