• Security Systems
• Networked Systems

2023

• Skyplane: Optimizing Transfer Cost and Throughput Using Cloud-Aware Overlays. Paras Jain, Sam Kumar, Sarah Wooders, Shishir G. Patil, Joseph E. Gonzalez, and Ion Stoica. 20th USENIX Symposium on Networked Systems Design and Implementation (NSDI 2023).

2021

• MAGE: Nearly Zero-Cost Virtual Memory for Secure Computation. Sam Kumar, David E. Culler, and Raluca Ada Popa. 15th USENIX Symposium on Operating Systems Design and Implementation (OSDI 2021). Received a Jay Lepreau Best Paper Award at OSDI 2021.

2020

• Performant TCP for Low-Power Wireless Networks. Sam Kumar, Michael P Andersen, Hyung-Sin Kim, and David E. Culler. 17th USENIX Symposium on Networked Systems Design and Implementation (NSDI 2020). Received an Applied Networking Research Prize from the IETF/IRTF in 2022.
• Ghostor: Toward a Secure Data-Sharing System from Decentralized Trust. (*Co-primary authors) *Yuncong Hu, *Sam Kumar, and Raluca Ada Popa. 17th USENIX Symposium on Networked Systems Design and Implementation (NSDI 2020).

2019

• JEDI: Many-to-Many End-to-End Encryption and Key Delegation for IoT. Extended Version (published as Technical Report No. arXiv:1905.13369 [cs.CR]) Sam Kumar, Yuncong Hu, Michael P Andersen, Raluca Ada Popa, and David E. Culler. 28th USENIX Security Symposium (USENIX Security 2019).
• WAVE: A Decentralized Authorization Framework with Transitive Delegation. Michael P Andersen, Sam Kumar, Moustafa AbdelBaky, Gabe Fierro, John Kolb, Hyung-Sin Kim, David E. Culler, and Raluca Ada Popa. 28th USENIX Security Symposium (USENIX Security 2019).
• Thread/OpenThread: A Compromise in Low-Power Wireless Multihop Network Architecture for the Internet of Things. Hyung-Sin Kim, Sam Kumar, and David E. Culler. IEEE Communications Magazine, Vol. 57, No. 7 (ComMag July 2019).

2018

• System Architecture Directions for Post-SoC/32-bit Networked Sensors. Hyung-Sin Kim, Michael P Andersen, Kaifei Chen, Sam Kumar, William J. Zhao, Kevin Ma, and David E. Culler. 16th ACM Conference on Embedded Networked Sensor Systems (SenSys 2018). Received a Best Paper Runner-Up Award at SenSys 2018.
• Demo Abstract: Bringing Full-Scale TCP to Low-Power Networks. Sam Kumar, Michael P Andersen, Hyung-Sin Kim, and David E. Culler. 16th ACM Conference on Embedded Networked Sensor Systems (SenSys 2018).

2016

• Well-Connected Microzones for Increased Building Efficiency and Occupant Comfort. Michael P Andersen, Gabe Fierro, Sam Kumar, Joyce Kim, Edward A. Arens, Hui Zhang, Paul Raftery, and David E. Culler. 2016 ACEEE Summer Study on Energy Efficiency in Buildings (SSB 2016).

2015

• DISTIL: Design and Implementation of a Scalable Synchrophasor Data Processing System. Michael P Andersen, Sam Kumar, Connor Brooks, Alexandra von Meier, and David E. Culler. 2015 IEEE International Conference on Smart Grid Communications (SmartGridComm 2015).
• Poster Abstract: Well-Connected Microzones for Increased Building Efficiency and Occupant Comfort. Michael P Andersen, Gabe Fierro, Sam Kumar, Michael Chen, Leonard Truong, Joyce Kim, Edward A. Arens, Hui Zhang, Paul Raftery, and David E. Culler. 2nd ACM International Conference on Embedded Systems for Energy-Efficient Built Environments (BuildSys 2015).