报告人：韩金广,教授
报告时间：2018年12月20日（星期四）上午 10：00
报告地点：无线谷六号楼6320会议室
摘要：Anonymous Single-Sign-On authentication schemes have been proposed to allow users to access a service protected by a verifier without revealing their identity. This has become more important with the introduction of strong privacy regulations. We describe a new approach whereby anonymous authentication to different verifiers is achieved via authorisation tags and pseudonyms. The particular innovation of our scheme is that authentication can occur only between a user and its designated verifier for a service, and the verification cannot be performed by any other verifier. The benefit of this authentication approach is that it prevents information leakage of a user's service access information, even if the verifiers for these services collude. Our scheme also supports a trusted third party who is authorised to de-anonymise the user and reveal her whole service access information if required. Furthermore, our scheme is lightweight because it does not rely on attribute or policy-based signature schemes to enable access to multiple services. The scheme's security model is given together with a security proof, an implementation and a performance evaluation.
报告人简介：韩金广，博士，英国萨里大学计算机科学系网络空间安全研究中心研究员。2013年在澳大利亚卧龙岗大学计算机科学与软件工程学院获博士学位。研究方向包括密码学、云计算、访问控制和隐私保护系统。在IEEE TPDS, IEEE TC, IEEE TIFS, ESORIC等期刊和会议发表学术论文40多篇。曾获“国家优秀自费留学生奖学金”。应邀担任第十届国际可证明安全会议（ProvSec2016）程序委员会主席，担任PST’18，CANS’17, TrustCom’16等五十多个国际会议程序委员会委员，担任期刊《Soft Computing》编委（associate editor），担任《Future Generation Computer Systems》、《International Journal of Information Security》、《 International Journal of Foundations of Computer Science》等期刊客座编委。IEEE高级会员、中国密码学会高级会员、ACM会员。
