Strengthening Spread Spectrum Watermarking Security via Key Controlled Wavelet Filter

  • Bingbing XiaEmail author
  • Xianfeng Zhao
  • Dengguo Feng
  • Mingsheng Wang
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8948)


Spread spectrum watermarking security can be evaluated via mutual information. In this paper, we present a new method to reduce mutual information by embedding watermark in the key controlled wavelet domain. Theoretical analysis shows that the watermark signals are diffused and its energy is weakened when they are evaluated from the attacker’s observation domain, and it can lead to higher document-to-watermark energy ratio and better watermark security without losing robustness. Practical algorithms of security tests using optimal estimators are also applied and the performance of the estimators in the observation domain is studied. Besides, we also present a novel method of calculating the key controlled wavelet filter, and give both numerical and analytical implementations. Experiment results show that this method provides more valid parameters than existing methods.


Watermarking security Spread spectrum Key controlled wavelet Parameterizations Mutual information 



This work was supported by the NSF of China under 61170281, NSF of Beijing under 4112063, Strategic and Pilot Project of CAS under XDA06030601, and the Project of IIE, CAS, under Y1Z0041101 and Y1Z0051101.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Bingbing Xia
    • 1
    Email author
  • Xianfeng Zhao
    • 1
  • Dengguo Feng
    • 1
  • Mingsheng Wang
    • 1
  1. 1.State Key Laboratory of Information SecurityInstitute of Information Engineering, Chinese Academy of SciencesBeijingPeople’s Republic of China

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