报告题目：Secure In-Band Trust Establishment for Constrained Wireless Devices
报告日期及时间：2016年06月08日星期三，下午3：00
报告地点： 计算机学院大楼B-403
报告人：Ming Li
报告人国籍：China
报告人单位：University of Arizona, USA
报告人简介：Ming Li is an Associate Professor in the Department of Electrical and Computer Engineering (ECE) of University of Arizona. He was an Assistant Professor in the Computer Science Department at Utah State University from 2011 to 2015. He received his Ph.D. in ECE from Worcester Polytechnic Institute in 2011. His main research interests include wireless networking and cyber security, with current emphases on cross-layer optimization with MIMO and smart antennas, wireless and spectrum security, privacy-preserving big data analytics, and cyber-physical system security. He received the NSF Early Faculty Development (CAREER) Award in 2014, and the ONR Young Investigator Program (YIP) Award in 2016. He has won a distinguished paper award from ACM ASIACCS 2013, and CCC blue sky ideas award for best vision papers at ACM SIGSPATIAL 2015. He serves on the TPC of several premier conferences including IEEE INFOCOM, CNS, Globecom, ICC, ACM ASIACCS, and WiSec. He is a member of both IEEE and ACM.
报告摘要：With the proliferation of advanced personal wireless devices, such as mobile phones, wearable devices and smart home sensors, it becomes more and more critical to secure the communications among them by establishing authenticated secret keys. The major challenge for initial key establishment, is the lack of pre-shared secrets among personal devices that are deployed in an ad hoc manner. In addition, personal devices are likely to be constrained in hardware interfaces and computational resources. Existing techniques such as device pairing usually need auxiliary secure channels or user interfaces that may not be present, and require significant human effort.
In this talk, we take a different “in-band” approach to establish initial trust without prior secrets, which is done purely using the wireless channel and with little human support. The key idea is to assure message integrity protection and authentication by countering signal cancellation in the wireless channel. We first build Chorus, which is a novel primitive that simultaneously compares the equality of fixed-length authentication strings held by multiple wireless devices within constant time. Chorus is then used as a foundation to design scalable in-band group message authentication and key agreement protocols, which do not require any prior shared secret. We also systematically studied the theoretical limit of signal cancellation attacks and defenses through a game-theoretic framework, and proposed a practical protocol to ensure the infeasibility of signal cancellation in the real-world. Finally, I will discuss some future research challenges in this area.
邀请人： 王骞 教授
