报告题目：Identity-Based Equality Search over Encrypted Data with Flexible Authorization

报告人：黄琼 教授、博导

报告时间：14:30-16:00，2018年6月22号

报告地点：长安校区 文津楼三段622报告厅

报告摘要: In a cloud of health records, hospitals outsource their records to the cloud and encrypt the sensitive data in order to protect the privacy of patients. However, traditional database join operation does not work on encrypted data. Furthermore, as access pattern leaks information, it is necessary to control the access to the records. Therefore, it is desired to have an encryption mechanism which allows only authorized users to search among the records encrypted under different keys. In this talk we introduce a new notion, called identity-based encryption with equality test supporting flexible authorization (IBEET-FA). It supports the test of whether two ciphertexts encrypted under different keys encapsulate the same message, and in the meanwhile supports fine-grained authorization of the test. Besides, IBEET-FA does not suffer from the complex key management problem of its counterpart in the traditional public key infrastructure. We propose a concrete construction of IBEET-FA, and prove it to be secure based on simple mathematical assumptions. Experimental results show that our IBEET-FA scheme is efficient and can satisfy various types of search over encrypted health records.

报告人介绍： 黄琼，教授，博导。2010年获香港城市大学博士学位，2011年至今在华南农业大学工作，主要研究密码学与信息安全。近年来主持了多项国家自然科学基金和省部级科研项目，发表各类论文80余篇。现为华南农业大学数学与信息学院副院长，广东省自然科学基金杰出青年基金获得者，广东省特支计划科技创新青年拔尖人才，广州市珠江科技新星。担任中国密码学会青年工作委员会委员，中国计算机学会广州分部执行委员，广东省计算机学会理事、云计算专委会副主任委员、网络空间安全专委会副主任委员。担任了40余个国际会议的程序委员会委员以及30余个国际学术期刊的同行评审专家。曾获2016年教育部霍英东教育基金会高等院校青年教师奖，2017年ACM中国新星奖广州分会奖。