About me

I’m a Ph.D. candidate at UMass Amherst in the College of Information and Computer Science under the supervision of Amir Houmansadr. My research focus is in security, privacy, and fairness of machine learning algorithms. I received my M.Sc degree from Amirkabir University of Technology under supervision of Babak Sadeghiyan, where I designed a congestion control for Tor to mitigate DoS attacks as my thesis.

Research Interests:

• Security and Privacy of Machine Learning Algorithms
• Personalization in Federated Learning
• Robustness of Federated Learning Algorithms
• Private Information Retrieval (PIR)

Experiences:

• University of Massachusetts Amhers
  • Research Assistant - Supervisor: Dr. Amir Houmansadr
  • 2017 - Present
• Oracle Labs
  • Machine Learning Research Intern - Supervisor: Dr. Virendra Marathe
  • May 2022 - Aug 2022
• APA Research Center (CERT Division), Amirkabir University of Technology
  • Researcher in Incident Response Team - Supervisor: Dr. Salman Niksefat
  • 2015 - 2016
• Amirkabir University of Technology
  • Research Assistant - Supervisor: Dr. Babak Sadeghyian
  • 2014 - 2017

Publications

• Every Vote Counts: Ranking-Based Training of Federated Learning to Resist Poisoning Attacks
  • Hamid Mozaffari, Virat Shejwalkar and Amir Houmansadr
  • To appear in the 32nd USENIX Security Symposium, 2023
• FedPerm: Private and Robust Federated Learning by Parameter Permutation
  • Hamid Mozaffari, Virendra J. Marathe and Dave Dice
• Private and Robust Federated Learning by Parameter Permutation
  • Hamid Mozaffari, Virendra J. Marathe and Dave Dice
  • FL-NeurIPS, 2022
• E2FL: Equal and Equitable Federated Learning
  • Hamid Mozaffari and Amir Houmansadr
• Equity and Equality in Fair Federated Learning
  • Hamid Mozaffari and Amir Houmansadr
  • ICML 2022 Workshop on Responsible Decision Making in Dynamic Environments, 2022
• Robust Federated Learning By Training on Parameter Ranks
  • Hamid Mozaffari, Virat Shejwalkar and Amir Houmansadr
  • FL-AAAI-22, 2022
• Heterogeneous Private Information Retrieval
  • Hamid Mozaffari and Amir Houmansadr
  • 7th Network and Distributed System Security Symposium, NDSS 2020
• Blocking-Resilient Communications in Information-Centric Networks using Router Redirection
  • Hamid Mozaffari, Amir Houmansadr and Arun Venkataramani
  • IEEE Globecom, ICEC 2019