Electronic documents, similarly as printed documents, need to be secured by adding some specific features that allow efficient copyright protection, authentication, document tracking or investigation of counterfeiting and forgeries. Microsoft Word is one of the most popular word processors, and several methods exist for embedding data specially in documents produced by it. We present a new type of methods for hiding data in Microsoft Word documents, named as Property coding, which deploys properties of different document objects (e.g., characters, paragraphs, and sentences) for embedding data. We give four different ways of Property coding, which are resistant to save actions, introduce very small overhead on the document size (about 1%), can embed up to 8 bits per character, and of course, are unnoticed by readers. Property coding belongs to format based methods of text steganography.
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机译：电子文档与印刷文档类似，需要通过添加一些特定功能来保护，这些特定功能允许有效的版权保护，身份验证，文档跟踪或对伪造和伪造的调查。 Microsoft Word是最流行的文字处理器之一，并且有几种方法可以将数据特别嵌入在由其生成的文档中。我们提供了一种新型的用于在Microsoft Word文档中隐藏数据的方法，称为“属性编码”，该方法可部署不同文档对象的属性（例如，字符，段落和句子）以嵌入数据。我们提供了四种不同的属性编码方式，它们可以防止保存操作，在文档大小上引入很小的开销（大约1％），每个字符最多可以嵌入8位，当然，读者也不会注意到。属性编码属于基于文本隐写术的基于格式的方法。
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