• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2013, Vol. 35 ›› Issue (8): 46-51.

• 论文 • 上一篇    下一篇

结合快速编码的F5隐写算法改进

吴松1,张敏情1,2,吴旭光1   

  1. (1.武警工程大学电子技术系网络与信息安全武警部队重点实验室,陕西 西安 710086;2.武警工程大学信息安全研究所,陕西 西安 710086)
  • 收稿日期:2012-10-16 修回日期:2013-01-08 出版日期:2013-08-25 发布日期:2013-08-25
  • 基金资助:

    陕西省自然科学基金基础研究项目(2012JM8014);武警工程大学基础研究基金资助计划(WJY201123)

Improvement of F5 algorithm combined with fast coding     

WU Song1,ZHANG Minqing1,2,WU Xuguang1   

  1. (1.Key Laboratory of Network & Information Security under the Chinese Armed Police Force,
    Department of Electronics,Engineering College of the Armed Police Force,Xi’an 710086;
    2.Institute of Information Security, Engineering College of the Armed Police Force,Xi’an 710086,China)
  • Received:2012-10-16 Revised:2013-01-08 Online:2013-08-25 Published:2013-08-25

摘要:

数字图像隐写是隐秘通信的重要手段,其中Westfeld提出的F5隐写算法是在DCT域中比较好的算法。详细介绍了F5隐写算法的主要步骤,重点分析了F5算法中所采用的矩阵编码及秘密信息的密写方式,指出了其中的缺陷,并且分析了其缺陷产生的原因。在此基础上,使用修改率更低的快速编码取代原有的矩阵编码并改变其秘密信息的密写方式。实验表明,改进算法在安全性和嵌入容量上有了提高。

关键词: F5隐写算法, 安全性, 矩阵编码, 快速编码, 密写方式

Abstract:

Digital steganography is an important way for secret communication, and F5 steganographic algorithm proposed by Westfeld is an excellent steganography in DCT domain. The main steps of F5 steganographic algorithm is introduced, the matrix encoding and embedding process are analyzed. Its defects are pointed out and the caution is analyzed. Then the original matrix encoding of F5 steganographic algorithm is replaced by fast coding which has a lower rate of modification, and the original embedding process is also changed. Experiments show that the new improved algorithm has improvement in both security and capacity.

Key words: F5 steganographic algorithm;security;matrix encoding;fast coding;embedding mode