Before joining Cornell Tech in May, 2015, he spent four and a half years as an Assistant Professor at the University of Wisconsin-Madison. He completed his PhD at UC San Diego in 2010. His research spans a wide range of computer security topics, with recent focuses including new threats to, and improved opportunities for, cloud computing security, confidentiality and privacy in machine learning, and topics in applied and theoretical cryptography. His work has been featured in the New York Times, the MIT Technology Review, ABC News, U.S. News and World Report, and elsewhere. His work has been recognized by the UC San Diego Computer Science and Engineering Department Dissertation Award, an NSF CAREER Award, Best Paper Award at USENIX Security 2014, Distinguished Student Paper Award at Oakland 2016, and a Sloan Research Fellowship.