Computer Engineering and Applications ›› 2010, Vol. 46 ›› Issue (7): 93-95.DOI: 10.3778/j.issn.1002-8331.2010.07.028

• 网络、通信、安全 • Previous Articles     Next Articles

Secure performance analysis of digital watermarking algorithms of spread spectrum

ZHANG Zheng-bao,YANG Su-min,QU Chuan-bing   

  1. Department of Computer Engineering,Ordnance Engineering College,Shijiazhuang 050003,China
  • Received:2008-09-09 Revised:2008-11-20 Online:2010-03-01 Published:2010-03-01
  • Contact: ZHANG Zheng-bao



  1. 军械工程学院 计算机工程系,石家庄 050003
  • 通讯作者: 张政保

Abstract: The security performance of digital watermarking algorithms is studied by the parameter estimation theory,namely Cramer-Rao theorem,and the security extent under different attacks is derived.The simulation results of ISS(Improved Spread Spectrum) algorithm is given out to corroborate the analysis.

Key words: spread spectrum, digital watermarking, security, Cramer-Rao theorem, Fisher’ measure

摘要: 利用参数估计的相关理论对扩频水印算法的安全性进行了分析。从理论上推定了扩频算法在不同攻击下所能达到的安全值,利用ISS(Improved Spread Spectrum)扩频水印算法进行了仿真实验,对理论推导的结果进行了进一步验证,为以后开发鲁棒性和安全性更高的水印算法提供了依据。

关键词: 扩频通信, 数字水印, 安全性, Cramer-Rao定理, Fisher信息矩阵

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