| SARI算法安全性分析和改进方法 |
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| 引用本文： | 王效杰,许先朋,王华贞,黄帅帅,李平.SARI算法安全性分析和改进方法[J].山东工业大学学报,2007,37(2):93-96. |
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| 作者姓名： | 王效杰 许先朋 王华贞 黄帅帅 李平 |
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| 作者单位： | 山东大学信息科学与工程学院,山东济南250100 |
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| 基金项目： | 山东省自然科学基金（Y2004G02） |
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| 摘 要： | SARI（Self-authentication and recovery image watermarking system）算法是LIN和CHANG小组提出的，可以承受JPEG压缩的多媒体内容认证技术，它的安全性取决于分组函数和阀值的选定，简单的线性函数和单一的阀值必然导致其破解系统的复杂度较低，理论分析和仿真实验结果说明这种模型的弱点．将加密技术与分组函数配合使用并采用编码技术可以有效地提高破解系统的复杂度，增加系统的安全性．
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| 关 键 词： | 信息安全 多媒体认证 SARI算法 攻击 |
| 文章编号： | 1672-3961（2007）02-0093-04 |
| 修稿时间： | 2006-07-26 |
The security analysis of the SARI algorithm |
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| WANG Xiao-jie, XU Xian-peng, WANG Hua-zhen, HUANG Shuai-shuai, LI Ping.The security analysis of the SARI algorithm[J].Journal of Shandong University of Technology,2007,37(2):93-96. |
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| Authors: | WANG Xiao-jie XU Xian-peng WANG Hua-zhen HUANG Shuai-shuai LI Ping |
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| Affiliation: | School of Information Science and Engineering, Shandong University, Jinan 250100, China |
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| Abstract: | The SARI algorithm is the JPEG compression tolerant multimedia content authentication technique, which was proposed by LIN and Chang et al in 2001. Its security depends on the grouping function and the threshold. The cost of eliminating the watermark is small because of its linear function and the single thresh- old. Theories and experimental results show its weaknesses. Some novel methods are proposed to enhance the system security by using encryption and coding techniques. |
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| Keywords: | information security multimedia authentication SARI algorithm attack |
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