报告主题：Possibility and Impossibility Results for Receiver Selective Opening Secure PKE in the Multi-Challenge Setting
时间：12月18日(周五)下午3:00-6:00
地点：北二540
报告人：赖俊祚（邀请人:邓宇乔）
报告摘要：A PKE scheme is said to be receiver selective opening (RSO) secure if it can still protect messages transmitted to uncorrupted receivers after the adversary corrupts some receivers and learns their secret keys. Existing works construct RSO secure PKE schemes in a single-challenge setting, where the adversary can only obtain one challenge ciphertext for each public key. However, in practice, it is preferable to have a PKE scheme with RSO security in the multi-challenge setting, where public keys can be used to encrypt multiple messages. In this work, we explore the (im)possibility of achieving PKE schemes with receiver selective opening security in the multi-challenge setting.
报告人简介：赖俊祚，暨南大学网络空间安全学院/信息科学技术学院研究员、博士生导师。研究方向为密码学与信息安全（包括大数据、区块链、云计算及物联网安全），研究成果发表在EUROCRYPT、ASIACRYPT、PKC、ACM TISSEC、IEEE TIFS、IEEE TDSC、DCC等密码学和信息安全著名国际会议和国际期刊上。担任Frontiers Computer Science期刊青年编委，ESORICS、ACNS等信息安全著名国际学术会议程序委员会委员，中国密码学会区块链专委会委员，广东省计算机学会区块链专委会副主任委员和青工委常务委员等，主持和参与国家自然科学基金重点项目、国家自然科学基金优秀青年项目，广东省基础与应用基础研究重大项目、广东省自然科学基金杰出青年项目等。
