His research interest is on system and network security, including vulnerability discovery, Internet security (e.g., TCP/IP), Android security, side channels. He has published more than a dozen papers at the top security conferences including IEEE Security & Privacy, ACM CCS, USENIX Security, and NDSS. His work has resulted in real-world impact with security patches applied in Linux kernel, Android, and firewall products. His work on TCP side channel attacks won the most creative idea award at GeekPwn 2016 and winner award at GeekPwn 2017. His work is currently supported by 8 NSF grants (including the NSF CAREER Award) and two industrial gifts. Topic: Network side channel attacks: An Oversight Yesterday, A Lingering Threat Today