I am an Assistant Professor of Computer Science at Stanford University, where my research focuses on security and privacy. I'm also co-founder and Chief Technologist of Censys.
My research brings a data-driven approach to the study of computer and network security. I have built systems and tools to facilitate Internet-scale security measurement (e.g., ZMap and Censys) and used them to discover and correct vulnerabilities that only emerge when studied at global scale. My work has helped strengthen the Internet’s most important cryptographic protocols (TLS, SSH, secure email transport, and the HTTPS PKI), defend the Internet’s core
infrastructure, and guide the design and deployment of widely-used systems.