I am an engineer and security researcher. I cofounded Censys, an attack-surface management security startup. I left Censys after their Series A. I’m currently building something new as employee #2 at Nametag. I’m also a core contributor to the ZMap open-source project. I do part-time consulting and advising for startups. I can help with building out early engineering teams and cryptography engineering.

I defended my PhD at the University of Michigan in 2018. My advisor was J. Alex Halderman. I used Internet-wide scanning to study uses of cryptography on the Internet. This work led to the discovery of the Logjam and DROWN attacks on TLS, and the creation of Censys. I lectured the undergraduate security course in Fall 2016.

I was also lucky to intern with the Google Chrome security team in 2016, where I attempted to make OCSP suck less.

In 2021, I accidentally started a podcast with Deirdre Connolly and Thomas Ptacek.