| 视频哈希的安全性分析 |
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| 引用本文： | 刘丽,王永庆.视频哈希的安全性分析[J].西南交通大学学报,2012,47(4):675-679. |
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| 作者姓名： | 刘丽 王永庆 |
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| 作者单位： | 郑州航空工业管理学院计算机科学与应用系,河南郑州,450015 |
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| 基金项目： | 国家自然科学基金资助项目(51175443);河南省科技厅基础与前沿技术研究计划项目(112300410215);河南省高等学校青年骨干教师资助计划(2011GGJS-138);河南省教育厅科学技术研究重点项目资助计划(12A520046);河南省教育厅科技攻关项目(2010B510021) |
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| 摘 要： | 为了对鲁棒多媒体哈希的安全性进行定量分析,用Shannon的唯一解距离来解释鲁棒多媒体哈希的安全性.以一个典型的鲁棒视频哈希算法为例,对该算法的特征提取方式进行数学建模,并针对不同的攻击类型,用Shannon的唯一解距离测量该鲁棒视频哈希算法的安全级别,定量分析其安全性.分析结果表明:鲁棒视频哈希算法一个密钥的重复使用次数不能超过所求得的唯一解距离,否则,算法的密钥可以被估计出来.
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| 关 键 词： | 数字水印 视频哈希 安全性 唯一解距离 |
Security Analysis of Video Hashing |
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| LIU Li
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WANG Yongqing.Security Analysis of Video Hashing[J].Journal of Southwest Jiaotong University,2012,47(4):675-679. |
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| Authors: | LIU Li WANG Yongqing |
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| Institution: | (Department of Computer Science and Applications,Zhengzhou Institute of Aeronautical Industry Management,Zhengzhou 450015,China) |
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| Abstract: | In order to analyze the security of robust multimedia hashing quantitatively,Shannon’s unicity distance was adopted to explain the security of robust multimedia hashing.A typical robust video hashing algorithm was used as an example,and a mathematics model for randomized feature extraction of the algorithm was found.Attacks for the typical video hashing algorithm were classified,and unicity distance,a concept proposed by Shannon,was adopted to measure the security level of the typical video hashing algorithm and analyze its security quantitatively.Theoretical analysis results show that the repeated use number of times of a robust video hashing algorithm’s key cannot exceed the unicity distance,otherwise the key can be estimated. |
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| Keywords: | digital watermark video hashing security unicity distance |
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