Sebastian Angel
Raj and Neera Singh Assistant Professor
Levine Hall, Office 604
3330 Walnut Street
Philadelphia, PA 19104
Email: sebastian.angel at cis.upenn.edu
Phone: +1 (215) 898-9252
I'm an assistant professor of Computer and Information Science at Penn where I'm part of the Distributed Systems Laboratory, the Security and Privacy Laboratory, and The Warren Center for Network and Data Sciences. I'm the recipient of an NSF CAREER Award, a JPMorgan Faculty Award, the ACM SIGOPS Dennis M. Ritchie Dissertation Award, and the Bert Kay Best Dissertation Award. I was previously a senior researcher at Microsoft Research.
I'm broadly interested in systems, security, privacy, and networking. My work aims to:
CausalMesh: A Causal Cache for Stateful Serverless Computing
PVLDB Volume 17, Issue 13, 2024.
VLDB 2025, London, UK, September 2025. [abstract, paper, code]
Best paper award nominee
Selected for ACM SIGMOD Research Highlights
Oryx: Private detection of cycles in federated graphs
PETS 2025, Washington, DC, July 2025. [abstract, paper, code]
Structural temporal logic for mechanized program verification
arXiv, October 2024. [abstract, paper, code]
Reef: Fast Succinct Non-Interactive Zero-Knowledge Regex Proofs
USENIX Security 2024, Philadelphia, PA, August 2024. [abstract, paper, code]
MuCache: A General Framework for Caching in Microservice Graphs
NSDI 2024, Santa Clara, CA, April 2024. [abstract, paper, code]
On a Foundation Model for Operating Systems
MLSys@NeurIPS, New Orleans, LA, December 2023. [abstract, paper]
Nimble: Rollback Protection for Confidential Cloud Services
OSDI 2023, Boston, MA, July 2023. [abstract, paper, extended report, code]
Flamingo: Multi-Round Single-Server Secure Aggregation with Applications to Private Federated Learning
S&P 2023, San Francisco, CA, May 2023. [abstract, paper, extended report, code]
Addax: A fast, private, and accountable ad exchange infrastructure
NSDI 2023, Boston, MA, April 2023. [abstract, paper, code]
Executing Microservice Applications on Serverless, Correctly
POPL 2023, Boston, MA, January 2023. [abstract, paper, code]
Ibex: Privacy-preserving ad conversion tracking and bidding
CCS 2022, Los Angeles, CA, November 2022. [abstract, paper, extended report, code]
Efficient Representation of Numerical Optimization Problems for SNARKs
USENIX Security 2022, Boston, MA, August 2022. [abstract, paper, extended report, code]
Incremental Offline/Online PIR
USENIX Security 2022, Boston, MA, August 2022. [abstract, paper, extended report, code]
Optimizing Data-intensive Systems in Disaggregated Data Centers with TELEPORT
SIGMOD 2022, Philadelphia, PA, June 2022. [abstract, paper]
Rolis: a software approach to efficiently replicating multi-core transactions
EuroSys 2022, Rennes, France, April 2022. [abstract, paper, code]