一个自然语言水印嵌入安全性评估方案

An Evaluating Scheme for Embedding Security of Natural Language Watermarking

随着互联网的发展,获得未授权的数字媒体变得比以往容易。自然语言水印是一种为自然语言文档特别设计的数字版权管理技术。它将水印嵌入到文档中,但不改变文档的含义。虽然已经有不少精心设计的自然语言水印算法,但是对它们的嵌入质量和安全性只有简单的说明。本文中,我们提出了一个自然语言水印嵌入安全性的评估方案,定义了理想不可检测性,并提出了构造针对特定检测器的不可检测性的交互证明系统。本文也对一些实际系统按此方案作了评价。

With the development of Internet, it is easier to get unauthorized digital media than ever before. Natural language watermarking （NLW） is a kind of digital rights management （DRM） techniques specially designed for natural language documents. NLW embeds watermark into documents in linguistic meaning - preserving ways. The previous research on designing elaborate watermarking algorithms, security or quality of these schemes is briefly discussed. In this paper, we propose an evaluating scheme for embed- ding security of NLW, define ideal undetectability, and design ways to construct an inter - proof system for undetectability against specific detector. We also apply this evaluating scheme to some practical NLW systems.