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。
Digital steganography is an important way for secret communication, and F5 stegano- graphic 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 stegano- graphic algorithm is replaced by fast coding which has a lower rate of modification, and the original em- bedding process is also changed. Experiments show that the new improved algorithm has improvement in both security and capacity.
出处
《计算机工程与科学》
CSCD
北大核心
2013年第8期46-51,共6页
Computer Engineering & Science
基金
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)
关键词
F5隐写算法
安全性
矩阵编码
快速编码
密写方式
F5 steganographic algorithm
security
matrix encoding
fast coding
embedding mode
