I am a fifth-year Ph.D. candidate in Computer Science at the University of Maryland, advised by Prof. Tudor Dumitraș. I expect to graduate in May 2026. I received my B.A. from Vanderbilt University in 2020, where I double majored in Mathematics and Computer Science and minored in Cinema and Media Arts.
I am experienced with virtual reality and computational sustainability research, but I now focus on topics relating to federated learning and adversarial machine learning. My dissertation explores applications of multi-exit models (MEMs), which are machine learning models that save on computational costs by allowing samples to exit the model early during inference. Specifically, I am exploring means of applying MEMs during training, both in federated and centralized settings within the language domain, and investigating their unique vulnerabilities in this context.
Outside of research, I enjoy bouldering and photography/videography.
Varma, K. & Dumitraș, T. MET-FL: Multi-Exit Training for Efficient Heterogeneous Federated Learning. (submitted to ICML’25)
Zhou, Y., Baracaldo, N., Anwar, A., & Varma, K. (2022, July). Dealing with Byzantine Threats to Neural Networks. Federated Learning: A Comprehensive Overview of Methods and Applications, SPRINGER NATURE, S.l., 2022, pp. 391-414.
Upadhyay, N., Marupudi, V., Varma, K., & Varma, S. (2025, March). Alignment of CNN and Human Judgments of Geometric and Topological Concepts. Association for the Advancement of Artificial Intelligence (AAAI 2025).
Varma, K., Numanoğlu, A., Kaya, Y., & Dumitraș, T. (2024, April). Understanding, Uncovering, and Mitigating the Causes of Inference Slowdown for Language Models. IEEE Conference on Secure and Trustworthy Machine Learning (SaTML 2024).
Varma, K., Zhou, Y., Baracaldo, N., & Anwar, Ali. (2021, September). LEGATO: A LayerwisE Gradient AggregaTiOn Algorithm for Mitigating Byzantine Attacks in Federated Learning. IEEE Cloud Computing 2021.
Fisher, D., Markert, E., Roberts, A., & Varma, K. (2019, June). Region radio: An AI that finds and tells stories about places. In K. Grace, M. Cook, D. Ventura, M& M. L. Maher (Eds.), Proceedings of the 10th International Conference on Computational Creativity (ICCC 2019), pp. 336-340. Charlotte, NC: Association for Computational Creativity.
Varma, K., Guy, S. J., & Interrante, V. (2017, November). Assessing the relevance of eye gaze patterns during collision avoidance in virtual reality. In R. W. Lindeman, G. Bruder, & D. Iwai (Eds.), Proceedings of the International Conference on Artificial Reality & Eurographics Symposium on Virtual Environments (ICAT-EGVE-2017), pp. 149-152. Adelaide, Australia: Eurographics Association.
Varma, K., Diao, E., Roosta, T., Ding, J., & Zhang, T. (2023, June). Once-for-All Federated Learning: Learning From and Deploying to Heterogeneous Clients. In International Workshop on Federated Learning for Distributed Data Mining (FL4Data-Mining, 2023).
Zhou, Y., Varma, K., & Baracaldo, N. Defending against adversarial attacks in federated learning. Published 1/11/2024.
Anwar, A., Zawad, S., Zhou, Y., Baracaldo, N., Varma, K., Abay, A., Chuba, E., Ong, Y., & Ludwig, H. Tokenized Federated Learning. Published 1/19/2023.
Zhou, Y., Baracaldo, N., Varma, K., Anwar, A., & Zawad, S. Byzantine-Robust Federated Learning. Published 12/24/2024.
Ph.D.
Major: Computer Science
Advisor: Dr. Tudor Dumitraș
Lab: Maryland Cybersecurity Center (MC2)
University of Maryland, College Park, MD
08/2020 - 05/2026
B.A.
Majors: Mathematics and Computer Science
Minor: Cinema and Media Arts
Vanderbilt University, Nashville, TN
08/2016 - 05/2020
Manager: Gang Cheng
Worked on a label denoising project to improve Meta's TEXI model, which generates text embeddings optimized for integrity-related tasks (e.g., classifying text based on integrity violations). My project resulted in a ~6% performance improvement, and I wrote a guide detailing how the label denoising process can be applied to other embedding models across different modalities (e.g., image or video).
Mentee: Arda Numanoğlu
Mentored an undergraduate student in the Summer at MC2 internship program. The intern co-authored a paper accepted to SaTML 2024.
Team: Alexa Invocation
Manager: Dr. Jie Ding
Mentor: Dr. Tanya Roosta
Developed a method for federated learning systems involving clients with heterogeneous resource constraints. Authored a paper on this method, accepted to the International Workshop on Federated Learning for Distributed Data Mining.
Team: AI Security and Privacy Solutions
Manager: Dr. Nathalie Baracaldo
Mentor: Dr. Yi Zhou
Analyzed Byzantine-robust aggregation algorithms in federated learning, developed a new defense, and co-applied for a patent. Studied certifiable robustness in federated learning contexts.
Team: AI Security and Privacy Solutions
Manager: Dr. Nathalie Baracaldo
Mentor: Dr. Yi Zhou
Developed a Byzantine-robust aggregation algorithm for federated learning. Co-authored a paper accepted to IEEE Cloud 2021 and filed a patent (now granted).
Team: AI Security and Privacy Solutions
Manager: Dr. Nathalie Baracaldo
Mentor: Dr. Yi Zhou
Researched clean-label poisoning attacks on deep neural networks and explored detection/mitigation methods.
Mentor: Dr. Douglas Fisher
Worked on an AI-driven storytelling tool focused on environmental topics using spatial context.
Mentor: Dr. Victoria Interrante
Conducted research on eye gaze patterns during collision avoidance in virtual reality environments.
TEDxVanderbiltUniversity Speaker
Lessons in Creativity from a Computer Artist Named Arthur
Vanderbilt University, Nashville, TN
November 2019
First Place Team, Almaden AI Hackathon
MovieMates: An iOS app that can give movie recommendations to an individual or group based on their ratings of movies.
IBM Almaden Research Center, San Jose, CA
June 2019
Accepted Poster, Computational Sustainability Doctoral Consortium
Region Radio: An AI that Finds and Tells Conservation-Themed Stories about Places and People
Cornell University, Ithaca, NY
September 2018
CRA-W GHC Research Scholar
Grace Hopper Celebration, Houston, TX
August 2018
Third Place Team, Google Games Nashville
Competition hosted by Google for solving math, coding, and logic puzzles
Nashville, TN
April 2018
Best Short Paper Award
Assessing the relevance of eye gaze patterns during collision avoidance in virtual reality.
ICAT-EGVE-2017, Adelaide, Australia.
November 2017
2025: International Conference on Machine Learning (ICML)
2025: International Conference on Learning Representations (ICLR)
2024: Conference on Neural Information Processing Systems (NeurIPS)
2023: Journal of Systems Architecture (JSA)
Spring 2025: Object-Oriented Programming II (CMSC132)
Fall 2024: Object-Oriented Programming I (CMSC131)
Spring 2024: Algorithms (CMSC351)
Fall 2022: Introduction to Data Science (CMSC320)
Spring 2022: Discrete Structures (CMSC250)
Fall 2021: Introduction to Data Science (CMSC320)
Spring 2021: Algorithms (CMSC351)
Fall 2020: Introduction to Artificial Intelligence (CMSC421)
I started a blog during undergrad where I write about various AI-related topics that interest me. I often incorporate personal anecdotes and original robot comics.
A hand-drawn animation short film I made during undergrad, The Mediocre Shapeshifter, was accepted to three film festivals: Bad Film Fest, We Like ‘Em Short – Animation and Comedy Film Festival, and Women in Comedy Festival.
Since starting climbing in Summer 2023, I've been posting videos of myself on TikTok (mainly as a way to track my progress).
EMAIL: kvarma[at]umd[dot]edu
OFFICE: 5112 Iribe Center, Department of Computer Science, University of Maryland, College Park. MD 20742