Hi, I'm Ryan Lehmkuhl!
I also go by Rain, he/they 🙂
I'm a fourth year PhD student at UC Berkeley (my first three years were at MIT) working under
the excellent guidance of Henry
Corrigan-Gibbs in the areas of cryptography, computer security, and systems.
Before beginning my PhD, I worked at Opaque, a startup
that provides a platform for collaborative data analytics on private data.
Prior to that, I graduated with a BS in EECS from UC Berkeley under the superb advisement
of Raluca Ada
Popa, Alessandro
Chiesa, and Pratyush
Mishra.
My email address is ryanleh [at] berkeley [dot] edu.
Publications
Heli: Heavy-Light Private Aggregation.
Ryan Lehmkuhl, Henry Corrigan-Gibbs, Emma Dauterman, David J. Wu.
USENIX Security 2026.
(Paper, Code)
Distributional Private Information Retrieval.
Ryan Lehmkuhl, Alexandra Henzinger, Henry Corrigan-Gibbs.
USENIX Security 2025.
(Paper, Code)
EOS: Efficient Outsourcing of zkSNARKs.
Alessandro Chiesa, Ryan Lehmkuhl, Pratyush Mishra, Yinuo Zhang.
USENIX Security 2023.
(Paper)
Muse: Client-Malicious Secure Inference.
Ryan Lehmkuhl, Pratyush Mishra, Akshayaram Srinivasan, Raluca Ada Popa.
USENIX Security 2021.
(Paper, Code)
Delphi: A Cryptographic Inference Service for Neural Networks.
Pratyush Mishra, Ryan Lehmkuhl, Akshayaram Srinivasan, Wenting Zheng, Raluca Ada Popa.
USENIX Security 2020.
(Paper, Code)