报告题目：基于移动设备上云计算的细粒度数据共享
（Fine-grained data sharing in cloud computing for mobile devices）
主讲人：邵俊
时间：12月23日（周三）下午3:00
地点：一教北楼320（威尼斯569游戏官网会议室）
主持人：游林
报告摘要：
Due to the convenience, the data sharing in cloud computing via mobile devices has become more and more popular. However, data confidentiality and online computational cost still present practical concerns to the deployment of data sharing in cloud computing for mobile devices. Existing data sharing protocols in cloud computing either cannot support the flexible sharing style for the encrypted data, or suffer from massive online computational cost that scales with the complexity of the access policy. In this paper, to cope with these challenging concerns, we propose a new data sharing protocol for cloud computing by using a new cryptographic primitive named online/offline attribute based proxy re-encryption and the transform key technique. To the best of our knowledge, the proposed data sharing protocol is the first one featuring with fine-grained access control, flexible sharing, data confidentiality, and minimum online computational cost on the user side at the same time. Furthermore, the proposed online/offline attribute-based proxy re-encryption scheme may be of independent interest. At last, extensive ****ysis shows that our proposed data sharing protocol is secure in terms of data confidentiality, and suitable for mobile devices in terms of online computational cost.
主讲人简介：
邵俊，现为浙江工商大学信息安全系副教授。2008年在上海交通大学获得博士学位，2008年至2010年在美国宾州州立大学进行博士后研究。主要研究方向为应用密码学和网络安全。发表学术论文50余篇，包括PKC、ESORICS、INFOCOM、IEEE TIFS等。主持在研/完成省部级及以上项目8项，其中包括两项国家自然科学基金项目和一项浙江省杰出青年基金项目。
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