报告题目：隐私集合运算统一框架的构造与实现

报告人：陈宇教授

工作单位：山东大学

时间：2024年12月20日（星期五）15:00

地点：合肥工业大学翡翠科教楼A座一楼第五会议室

报告简介：

Private set operations allow two parties to perform secure computation on their private sets, including intersection, union and functions of intersection/union. In this paper, we put forth a framework to perform private set operations. The technical core of our framework is the multi-query reverse private membership test (mqRPMT) protocol.We present two constructions of mqRPMT from newly introduced cryptographic notions, one is based on commutative weak pseudorandom function (cwPRF), and the other is based on permuted oblivious pseudorandom function (pOPRF). Both cwPRF and pOPRF can be realized from the decisional Diffie-Hellman (DDH)-like assumptions in the random oracle model.

We demonstrate the practicality of our framework with implementations. By plugging our cwPRF-based mqRPMT into the framework, we obtain various PSO protocols that are superior or competitive to the state-of-the-art protocols.

报告人简介：

陈宇，山东大学网络空间安全学院教授,博士生导师。本科毕业于合肥工业大学信息安全专业，博士毕业于北京大学。主要研究方向是密码学的理论与应用，近年聚焦零知识证明与专用多方安全计算协议。以第一或通讯作者在密码与安全领域的国际顶级会议CRYPTO、ASIACRYPT、PKC、ACM CCS、USENIX Security等和顶级期刊Journal of Cryptology等上发表论文多篇,主持承担国家自然科学基金多项,获2018中国密码学会密码创新奖二等奖，蝉联2020、2022央行金融密码杯创新赛最高奖，2022入选《麻省理工科技评论》中国隐私计算十大科技创新人物。