项目名称: 具有关键词搜索性质的代理重加密研究
项目编号: No.61202365
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 计算机科学学科
项目作者: 郭丽峰
作者单位: 山西大学
项目金额: 25万元
中文摘要: 具有关键词搜索性质的代理重加密有重要的应用价值,有效地应用在解决数字版权管理、加密的垃圾邮件外包过滤、安全的文件系统等数字化业务中。效率和安全性问题是具有关键词搜索性质的代理重加密中的关键问题。本研究拟从在标准模型下可证明安全的角度出发研究具有关键词搜索性质的代理重加密方案的设计与分析理论,我们将首先解决关键词的陷门传输不使用安全信道问题;通过引入陷门不可区分性的定义,拟研究陷门不可区分性和离线关键词猜测攻击之间的关系;通过减少使用密码本原(如一次性强不可伪造签名)提高具有关键词搜索性质的代理重加密方案的效率;在陷门的产生中采用一些技巧,使得所构造的方案在抵制适应性选择关键词攻击证明中只需要hash函数具备免碰撞性,从而在标准模型下可证明抵制适应性选择关键词攻击安全。
中文关键词: 双线性映射;代理重加密;关键字搜索;标准模型;
英文摘要: Proxy re-encryption with keyword search have applications in digital rights management, outsourced filtering of encrypted spam and distributed file storage systems. The efficiency and security are key issues in proxy re-encryption with keyword search scheme. The research will study the design and analysis theroy of proxy re-encryption with keyword search from the perspective of provably secure in the standard model. Firstly, the research will slove the problem of using secure channel when the delegator transimits the keyword's trapdoor. Secondly, we will give the defintion of trapdoor indistinguishability and show if the relationship of trapdoor indistinguishability and offline keyword guessing attack. Thirdly, we will improve the efficiency of proxy re-encryption with keyword search by reducing the cryptography primitive. Finally, we will adopt some techniques in the generation of trapdoor so that the proxy re-encryption with keyword search scheme will be proved CCA-secure in the standard model.
英文关键词: bilinear maps;proxy re-encryption;keyword search;standard model;