| 摘要: |
| 探讨了基于数字签名的多媒体信息认证系统的身份认证机制和内容认证机制,分析了其基本构成以及安全性和存在的安全缺陷,提出了一种结合数字签名和数字水印的多媒体信息认证方案.系统采用双重身份认证机制和易碎水印内容认证机制,使得非法接触以及修改、伪造多媒体信息的内容都是不可能的.分析表明,该多媒体信息认证方案具有安全性强、可信度高、认证精度高等特点. |
| 关键词: 多媒体认证 易碎水印 数字水印 数字签名 |
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| 基金项目:Supported by the National Natural Science Foundation of China under Grant Nos.60133020, 69975011, 60172067 (国家自然科学基金); the National High-Tech Research and Development Plan of China under Grant No.2002AA144060 (国家高技术研究发展计划(863)); the Cross-Century Talent Raising Program of Ministry of Education of China (国家教育部跨世纪优秀人才培养计划); the National Research Foundation for the Doctoral Program of Higher Education of China under Grant No.20020558038 (国家教育部博士点基金); the National Natural Science Foundation of Guangdong Province of China under Grant No.013164 (广东省自然科学基金) |
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| A Multimedia Authentication System Combining Digital Signature and Digital Watermarking |
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HU Jun-Quan,HUANG Ji-Wu,ZHANG Long-Jun,HUANG Da-Ren
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| Abstract: |
| In this paper, the issues of entity authentication and content authentication mechanism of the digital signature based on multimedia system are addressed. Based on the analysis of the security gap in the authentication mechanism using digital signature, a novel authentication protocol combining digital signature and fragile watermarking are proposed. Double entity authentication based on digital signature and content authentication base on fragile watermarking is achieved. Illegal access to system, edition, and forgery of multimedia document is proven to be impossible. According to the analysis, the security, creditability, and authenticity are achieved. |
| Key words: multimedia authentication fragile watermarking digital watermarking digital signature |
