Rishabh Poddar

About Me

I'm the Co-Founder & CTO of Opaque Systems.

I received my Ph.D. in computer science from UC Berkeley, working in the RiseLab where I was advised by Raluca Ada Popa. I received my B.Tech. in computer science from IIT Kharagpur. I'm broadly interested in systems security and applied cryptography.

Before moving to Berkeley, I spent a couple of years at IBM Research working on software-defined networks and cloud computing. Before that, I briefly dabbled in management consulting at The Boston Consulting Group in India.

Publications

2021

• Senate: A Maliciously Secure MPC Platform for Collaborative Analytics
  Rishabh Poddar, Sukrit Kalra, Avishay Yanai, Ryan Deng, Raluca Ada Popa, Joseph M. Hellerstein
  USENIX Security 2021
  Paper Extended version

• ObliCheck: Efficient Verification of Oblivious Algorithms with Unobservable State
  Jeongseok Son, Griffin Prechter, Rishabh Poddar, Raluca Ada Popa, Koushik Sen
  USENIX Security 2021
  Paper

2020

• Visor: Privacy-Preserving Video Analytics as a Cloud Service
  Rishabh Poddar, Ganesh Ananthanarayanan, Srinath Setty, Stavros Volos, Raluca Ada Popa
  USENIX Security 2020
  2^nd Place, CSAW Applied Research Competition
  Paper Extended version

• Practical Volume-Based Attacks on Encrypted Databases
  Rishabh Poddar*, Stephanie Wang*, Jianan Lu, Raluca Ada Popa
  IEEE EuroS&P 2020
  (*Co-primary authors)
  Paper

• Secure Collaborative Training and Inference for XGBoost
  Andrew Law, Chester Leung, Rishabh Poddar, Raluca Ada Popa, Chenyu Shi, Octavian Sima, Chaofan Yu, Xingmeng Zhang, Wenting Zheng
  PPMLP 2020
  Paper

2019

• Arx: An Encrypted Database using Semantically Secure Encryption
  Rishabh Poddar, Tobias Boelter, Raluca Ada Popa
  VLDB 2019
  Paper Extended version

2018

• Oblix: An Efficient Oblivious Search Index
  Pratyush Mishra, Rishabh Poddar, Jerry Chen, Alessandro Chiesa, Raluca Ada Popa
  IEEE S&P (Oakland) 2018
  Paper

• SafeBricks: Shielding Network Functions in the Cloud
  Rishabh Poddar, Chang Lan, Raluca Ada Popa, Sylvia Ratnasamy
  NSDI 2018
  Paper Slides

2016

• Arx: A Strongly Encrypted Database System
  Rishabh Poddar, Tobias Boelter, Raluca Ada Popa
  Cryptology ePrint Archive, Report 2016/591
  ePrint

• A Secure One-Roundtrip Index for Range Queries
  Tobias Boelter, Rishabh Poddar, Raluca Ada Popa
  Cryptology ePrint Archive, Report 2016/568
  ePrint

• Jury: Validating Controller Actions in Software-Defined Networks
  Kshiteej Mahajan*, Rishabh Poddar*, Mohan Dhawan, Vijay Mann
  DSN 2016 (*Co-primary authors)
  Paper

2015

• Hansel: Diagnosing Faults in OpenStack
  Dhruv Sharma*, Rishabh Poddar*, Kshiteej Mahajan, Mohan Dhawan, Vijay Mann
  CoNEXT 2015 (*Co-primary authors)
  Paper

• Sphinx: Detecting Security Attacks in Software-Defined Networks
  Mohan Dhawan, Rishabh Poddar, Kshiteej Mahajan, Vijay Mann
  NDSS 2015
  Paper

Earlier

• Haven: Holistic Load Balancing and Auto Scaling in the Cloud
  Rishabh Poddar, Anilkumar Vishnoi, Vijay Mann
  COMSNETS 2015
  Paper

• Effective Switch Memory Management in OpenFlow Networks
  Anilkumar Vishnoi, Rishabh Poddar, Vijay Mann, Suparna Bhattacharya
  DEBS 2014
  Paper

• Remedy: Network-Aware Steady State VM Management for Data Centers
  Vijay Mann, Akanksha Gupta, Partha Dutta, Anilkumar Vishnoi, Parantapa Bhattacharya, Rishabh Poddar, Aakash Iyer
  NETWORKING 2012
  Paper

• An Enhanced Differential Cache Attack on Clefia for Large Cache Lines
  Chester Rebeiro, Rishabh Poddar, Amit Datta, Debdeep Mukhopadhyay
  INDOCRYPT 2011
  Paper

• A Cache Trace Attack on Camellia
  Rishabh Poddar, Amit Datta, Chester Rebeiro
  InfoSecHiComNet 2011
  Paper