计算机工程 ›› 2008, Vol. 34 ›› Issue (4): 159-161.doi: 10.3969/j.issn.1000-3428.2008.04.056

• 安全技术 • 上一篇    下一篇

安全空域掩密算法

高 明   

  1. (西安电子科技大学综合业务网国家重点实验室,西安 710071)
  • 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

Security Spatial Steganographic Algorithm

GAO Ming   

  1. (State Key Lab. of Integrated Service Networks, Xidian Univ., Xi’an 710071)
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-02-20 Published:2008-02-20

摘要: 分析了在最低有效位LSB信息嵌入过程中引入矩阵编码技术对LSB算法的安全性的影响,指出矩阵编码算法由于降低了信息嵌入过程中改变图像像素LSB的概率,从而增加了空域掩密算法的安全嵌入信息的容量。改进了传统的LSB信息嵌入算法,改变其单一嵌入模式,加入称为“偏移嵌入”的信息嵌入方法,使改进后的算法可有效地抵抗RS攻击。

关键词: 空域掩密技术, LSB算法, RS掩密分析技术, 矩阵编码

Abstract: The impact of matrix encoding to the security of Least Significant Bit(LSB) steganographic algorithm is analyzed: the security embedding capacity will increase using matrix encoding for it can reduce the probability of changing the pixel’s LSB during the information embedded process. An improved steganographic algorithm is put forward which changes the simple embedded mode of the classical LSB algorithm by adding a new method called “shift embed” to it. The improved algorithm can resist RS steganalysis completely.

Key words: steganography, LSB algorithm, RS steganalysis, matrix encoding

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