项目名称: 抗泄露的函数加密体制研究
项目编号: No.61303257
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 自动化技术、计算机技术
项目作者: 陈宇
作者单位: 中国科学院信息工程研究所
项目金额: 25万元
中文摘要: 函数加密作为新出现的密码组件,允许加密方通过加密操作对机密数据实施任意细粒度的访问控制,因此它在云计算等需要隐私保护的环境中有着优雅广泛的应用。在函数加密发展的同时,多种侧信道攻击方法的出现使得抗泄漏密码学成为当前研究的另一焦点,泄漏安全正在逐渐成为密码体制的事实标准。本项目的研究内容是上述两个研究领域的结合点,以抗泄漏的函数加密为研究目标, 探索函数加密获得泄漏安全的一般途径与方法,具体包括: (1)在多种泄漏模型下给出函数加密的多级别泄漏安全定义;(2)研究抗泄漏函数加密方案的一般构造方法与关键技术;(3)研究如何进一步提升泄漏安全级别(包括抗主私钥泄漏和抗后挑战密文泄漏)和泄漏比率。 本项目对函数加密的泄漏安全展开全面系统的研究,力图从理论和实际两方面解决函数加密体制在侧信道攻击下存在的问题,为后续相关研究奠定理论基础。
中文关键词: 函数加密;抗泄漏;可证明安全;;
英文摘要: As a newly emerged primitive,functional encryption allows one to implement any fine-grained access control policy over confidential data via encryption. Therefore, it has found numerous elegant applications in cloud computing and many other environments wherever privacy-preserving technologies are demanded. Orthoganal to the development of functional encryption, a myriad of side-channel attacks makes the importance of leakage-resilient cryptography looms large. Leakage-resilience is becoming a de-facto level of security for cryptosystems used in practice. Our work lies at the interaction of these two areas, in more details, it includes: (1) introducing different levels of leakage-resilient security notions under different leakage model; (2) seeking for generic approach to attain leakage-resilient security for functional encryption; (3) investigating how to further enhance the leakage-resilience(include master secret key leakage and after-the-fact leakage) and improve the leakage ratio. This project initiates the study of leakage-resilient functional encryption, with the aim of securing funcational encryption against a wide range of side-channel attacks from both theory and practice aspects, as well as laying a solid foundation for further work.
英文关键词: function encryption;leakage resilience;provable security;;