About / Bio
Welcome!
I am a Postdoctoral Scholar in the Computer Science Department at the University of California, Davis, working with Prof. Prasant Mohapatra. Prior to this, I received my PhD Degree in Computer Science from UC Davis in September 2023, also advised by Prof. Mohapatra. My research primarily focuses on improving Machine Learning (ML) models to further facilitate their adoption into society by analyzing and improving model robustness along two dimensions: (i) adversarial robustness (adversarial attacks/defenses against learning models) and (ii) social robustness (fair machine learning and trustworthy AI).
I am also interested in other applied and related problems such as (i) designing learning based debiasing interventions for social media platforms (YouTube/Twitter, among others) and (ii) ML based approaches for improving networked systems.
Email: chhabra[at]ucdavis[dot]edu
Find me on: LinkedIn||Github ||Google Scholar
NEWS:
9/21/2023: Our paper "Auditing YouTube’s Recommendation System for Ideologically Congenial, Extreme, and Problematic Recommendations" was accepted for publication in PNAS [pdf] [code]
1/20/2023: Our paper "Robust Fair Clustering: A Novel Fairness Attack and Defense Framework" was accepted at the ICLR 2023 Main Conference [pdf] [code]
10/15/2022: I was invited to give a seminar talk on Robust Clustering at Brandeis University, Boston by Prof. Hongfu Liu
9/14/2022: Our paper "On the Robustness of Deep Clustering Models: Adversarial Attacks and Defenses" was accepted at the NeurIPS 2022 Main Conference [pdf] [supplementary] [code] [poster]
6/15/2022: Our paper on "Updatable Clustering via Patches" was accepted as a poster at the Updatable Machine Learning (UpML) workshop @ ICML 2022 [pdf]
1/25/2022: Invited by Kyle Polich as a guest on the Data Skeptic podcast [Spotify link]
10/21/2021: Our paper on "Fair Clustering Using Antidote Data" was accepted at the AFCR workshop @ NeurIPS 2021 for a contributed talk (top 6 papers), and is published in PMLR [pdf] [supplementary]
10/21/2021: Our paper on "Fairness Degrading Adversarial Attacks Against Clustering" was accepted at the AFCR workshop @ NeurIPS 2021 as a poster [pdf] [supplementary] [code]
10/11/2021: Invited keynote at MTD workshop @ ACM CCS 2021 for our paper on MTD for adversarial machine learning (talk by Prof. Mohapatra) [pdf] [supplementary]
9/17/2021: Our survey paper on fairness in clustering was accepted for publication in IEEE Access [pdf]
1/10/2020: Our paper "Suspicion-Free Adversarial Attacks Against Clustering Algorithms" was accepted in the AAAI 2020 Main Technical Conference [pdf] [code] [poster]
1/25/2019: Invited to talk about our research on adversarial attacks against clustering at Uber AI in SF by Ryan Turner
12/1/2018: Presented our paper on the Tensorflex framework at the MLOSS workshop @ NeurIPS 2018 [pdf] [code]
