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计算机工程 ›› 2009, Vol. 35 ›› Issue (1): 10-12,2. doi: 10.3969/j.issn.1000-3428.2009.01.004

• 博士论文 • 上一篇    下一篇

分形水印检测边界的抗Oracle攻击安全性

赵启阳,尹宝林   

  1. (北京航空航天大学软件开发环境国家重点实验室,北京 100083)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-01-05 发布日期:2009-01-05

Security of Fractal Watermarking Detection Boundaries Against Oracle Attacks

ZHAO Qi-yang, YIN Bao-lin   

  1. (State Key Laboratory of Software Development Environment, Beijing University of Aeronautics and Astronautics, Beijing 100083)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-01-05 Published:2009-01-05

摘要: 对于扩频水印机制,水印检测边界的分形化是对抗Oracle攻击的一种主要方法。该文研究Oracle攻击的攻击距离对水印信号估计的影响,发现具有高检测值的攻击发起点能够有效地增强水印估计的准确性。分析和实验表明,直接从目标信号处发起的Oracle攻击能够有效地削弱检测边界分形化的影响,并且成功地去除含水印作品中的水印信号。

关键词: 数字水印, Oracle攻击, 分形检测边界

Abstract: The fractal detection boundary is an important countermeasure to the Oracle attack. The paper investigates the effect of the attacking distance between the distorted signals from which the Oracle attack starts and the detection boundaries on the accuracy of watermark estimations. Analysis and experiments show that it is more accurate to estimate the watermarks with high detection values. The Oracle attacks directly launched from the object signals can eliminate the negative effect of fractal boundaries and remove the watermarks successfully.

Key words: digital watermarking, Oracle attack, fractal detection boundary

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