计算机工程 ›› 2008, Vol. 34 ›› Issue (4): 157-158.doi: 10.3969/j.issn.1000-3428.2008.04.055

• 安全技术 • 上一篇    下一篇

图像LSB密写的信息隐藏量分析

郭立甫1,3,高 媛2,王嘉祯1   

  1. (1. 军械工程学院计算机系,石家庄 050081;2. 河北经贸大学外语部,石家庄 050061;3. 河北经贸大学信息技术学院,石家庄 050061)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-02-20 发布日期:2008-02-20

Steganalysis About Quantity Hiding Data of LSB Steganography in Images

GUO Li-fu1,3, GAO Yuan2, WANG Jia-zhen1   

  1. (1. Department of Computer, Ordnance Engineering College, Shijiazhuang 050081; 2. Foreign Language Teaching Department, Hebei University of Economics and Trade, Shijiazhuang 050061; 3. Information Technology School, Hebei University of Economics and Trade, Shijiazhuang 050061)
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-02-20 Published:2008-02-20

摘要: 介绍了一种基于统计特性的LSB密写分析方法,对其进行了改进并提出了可靠估计信息隐藏长度的方法。该方法利用相邻像素相关性定义了统计量,可根据阈值判断秘密信息的有无。对待检测图像进行二次嵌入,根据统计量的变化建立模型,能可靠估计秘密信息隐藏长度。实验表明,估计出的信息量比较准确。

关键词: 信息隐藏, LSB密写, 密写分析, 隐藏量估计

Abstract: This paper introduces a steganalysis algorithm based on statistics method for LSB steganograhpy and mends it, proposes a method estimating the quantity of hiding data reliably. The method defines statistics using the relativity of close pixels and judges the existence of secret message with threshold. It inserts message in the waiting detected image again, modeles according to the changes of statistics. The model can estimate the quantity of hiding data reliably. Experimental results show the quantity of hiding data estimated is very exact.

Key words: information hiding, LSB steganography, steganalysis, estimation of quantity hiding data

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