计算机工程 ›› 2009, Vol. 35 ›› Issue (23): 146-148.doi: 10.3969/j.issn.1000-3428.2009.23.051

• 安全技术 • 上一篇    下一篇

基于伪随机数的数字水印

胡 旻,廖晓峰   

  1. (重庆大学计算机学院,重庆 400030)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-12-05 发布日期:2009-12-05

Digital Watermark Based on Quasi-random Number

HU Min, LIAO Xiao-feng   

  1. (College of Computer Science, Chongqing University, Chongqing 400030)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-12-05 Published:2009-12-05

摘要: 针对密码技术在数据保护方面的不足,提出一种新的数字水印算法——基于分块统计的水印嵌入算法。采用Logistic混沌序列发生器和m序列发生器产生伪随机数序列,将包含信息量较少、安全性要求较高的二值秘密图像嵌入载体图像。测试证明,该方法能使水印图像具有较高的信噪比,可完整方便地恢复出秘密图像。

关键词: 伪随机数, 随机间隔位, 分块统计

Abstract: In order to use cryptographic techniques to avoid the lack of data protection, this paper proposes a new watermark algorithm based on block statistics. It uses logistic chaotic sequence generator and m sequence generator to generate quasi-random number sequence. It imbeds the secret image pixels into original data in terms of a quasi-random number sequence. The statistic analysis indicates that the signal and noise ratio of watermark image is high and the secret image can be completely recovered.

Key words: quasi-random number, random interval, block statistics

中图分类号: