| 基于PDF文档作为掩体的信息隐写方法 |
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| 引用本文： | 钟尚平,陈铁睿.基于PDF文档作为掩体的信息隐写方法[J].计算机工程,2006,32(3):161-163. |
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| 作者姓名： | 钟尚平 陈铁睿 |
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| 作者单位： | 中国科学院计算技术研究所软件室,北京,100080;福州大学数学与计算机科学学院,福州,350002;中国科学院计算技术研究所软件室,北京,100080 |
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| 摘 要： | 日前应用极为广泛的PDF文档，发现了其中存在可以用作信息隐写的隐密信道。通过采用以一定的冗余换取安全性的策略，并使用基于混沌模型的随机选择隐写单元的方法，使隐写系统满足Kerckhoffs原理。分析和实验结果表明，该文隐写方法可嵌入任意大小的信息，并保持在PDF阅读器中显示的透明性，具有较好的简单实用性。
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| 关 键 词： | PDF文档 隐写术 隐密信道 Kerckhoffs原理 |
| 文章编号： | 1000-3428（2006）03-0161-03 |
| 收稿时间： | 2005-07-05 |
| 修稿时间： | 2005-07-05 |
Information Steganography Algorithm Based on PDF Documents |
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| ZHONG Shangping,CHEN Tierui.Information Steganography Algorithm Based on PDF Documents[J].Computer Engineering,2006,32(3):161-163. |
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| Authors: | ZHONG Shangping CHEN Tierui |
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| Affiliation: | 1. Software Division, Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100080;2. School of Mathematics and Computer Science, Fuzhou University, Fuzhou 350002 |
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| Abstract: | Aims at the prevalent PDF documents, this paper proposes a novel steganography algorithm. Firstly, it points out the secret channels in the PDF documents. Then, it describes the algorithm which is integrated with several strategies that are applied to improve security. The algorithm makes use of redundancy to complement security, and constitutes a chaotic map to meet the Kerckhoffs principle. The analysis and experimental results show that this algorithm is efficient that can embed data of unlimited length into PDF documents and the embedded PDF documents keep transparency when being displayed in PDF readers. |
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| Keywords: | PDF Documents Steganography algorithm Secret channel Kerckhoffs principle |
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