Mohsen
Ghasemizade

PhD candidate in Computer Science, University of Vermont

MassMutual Research Fellow, Computational Ethics Lab

I work on data privacy and machine learning: differentially private data releases, privacy attacks that test them, and LLM pipelines for policy and public-sector documents.

Mohsen Ghasemizade

Research

  • Illustration of a network of interlinked starfish

    Differential Privacy & Synthetic Data

  • Illustration of an eel coiled around deep-sea pillars

    Privacy-Preserving ML & LLMs

  • Illustration of an anglerfish with a glowing lure

    Policy & Regulatory Compliance

  • Illustration of a glowing, X-ray-like fish

    Computational Social Science

Publications

Published

Taste for Privacy: How Context, Identity, and Lived-Experience Shape Information Sharing Preferences

ACM FAccT 2026

Across 2,912 survey responses from 782 college students, comfort sharing personal data depends on who is asking. Discomfort with platforms predicts private settings, and students from marginalized groups or with adverse childhood experiences are less comfortable with institutions of power.

Concentric colored rings, one per institution, showing how comfortable students are sharing personal data with each
Circles of trust, one ring per institution

Aim High, Stay Private: Differentially Private Synthetic Data Enables Public Release of Behavioral Health Information with High Utility

JAMIA Open, 2026

Releasing survey and Oura ring data from 600+ first-year students in the LEMURS study as differentially private synthetic data. AIM, MST, and PATECTGAN are compared across privacy budgets from ε = 1 to 100; AIM at ε = 5 keeps the data useful while resisting privacy attacks.

UMAP projections of the original and synthetic survey data at different privacy budgets
UMAP of original and synthetic data across ε

Developing a Hierarchical Model for Unraveling Conspiracy Theories

EPJ Data Science, 2024

A tree of 120+ conspiracy theories, built from the literature and 1,769 fact-checking articles, and a pipeline that finds and sorts conspiracy theories in new text: a RoBERTa classifier (87% F1), UMAP and HDBSCAN clustering, cluster labels, and named entities.

The tree of conspiracy theories, grouped into eight families
The conspiracy theory tree

Under review

Making Local Government Contracts Legible: A Computational Pipeline for Classifying and Mapping Intergovernmental Service Agreements

Preprint, 2026. Under review at Government Information Quarterly

Neural OCR, LLM classification, and network modeling for 21,000+ Iowa 28E intergovernmental agreements, with 96% extraction accuracy and 82% weighted F1. A hierarchical stochastic block model of the statewide contract network shows a stratified buyer–seller structure across government types.

Edge-bundled circular network of Iowa service contracts, colored by stochastic block model group
Block structure of the statewide contract network

Membership Inference Attacks on Tabular Data Releases

Submitted to the Journal of Privacy and Confidentiality

The Multivariate Gaussian Attack models correlated counts across overlapping marginals instead of collapsing them to a single score. On Adult, ACS, and 2020 Census data it reaches an AUC of 0.98 on unprotected small groups, and the privacy budgets of recent Census-style releases (ρ ≥ 20) can still leave small groups exposed.

Figure from the membership inference attack paper
Attack results across privacy budgets

In progress

Privacy Policy Compliance Scoring

Computational Ethics Lab

Scores privacy policies against a 40-item GDPR and CCPA framework. Each chunk of a policy updates a Bayesian belief that a requirement is missing, vague, or clear, using embeddings and NLI models, until the system is sure enough. Only uncertain cases go to an LLM. A hand-labeled set of 100 policies is used for training and evaluation.

One policy chunk scored at 0.71, with likelihoods for missing, vague, and clear and the updated belief
Belief update for one chunk of a policy

Talks

Mohsen presenting at the OpenDP workshop

Aim High, Stay Private

June 2026, OpenDP Differential Privacy for Health and Genomics Workshop

Harvard University, Boston, MA

Utility trade-offs of differentially private synthetic data generators for LEMURS, a behavioral health study at UVM.

LinkedIn post
Poster on membership inference attacks at the TPDP workshop

Membership Inference Attack on Tabular Data

June 2026, Theory and Practice of Differential Privacy Workshop

Northeastern University, Boston, MA

A poster on a new membership inference attack for tabular data that fits the attack model with a multivariate Gaussian distribution.

LinkedIn post
Teaching high school students at the Governor’s Institutes of Vermont

Data Exploration with Python

May 2025, Governor’s Institutes of Vermont

University of Vermont, Burlington, VT

Data exploration with Python for talented high school students from across Vermont, staying on the UVM campus with the Governor’s Institutes of Vermont math program.

LinkedIn post

About

I’m a computer science PhD candidate at the University of Vermont and a MassMutual Research Fellow in the Computational Ethics Lab. My work sits where differential privacy, machine learning, and data governance meet: releasing sensitive data that people can still use, testing whether releases leak, and reading policies at scale with language models.

I earned my MS in computer science at UVM with a thesis on a computational, genealogical approach to conspiracy theories, and a BS in electrical engineering from Shiraz University. In 2026 I was an R&D intern at MassMutual, working with longitudinal health data from the Living Well app.

Outside research, I serve on the board of Local Motion, advancing safe streets and active transportation across Vermont, and I spend a lot of time on a bike.

Experience and education

  • 2026R&D Intern, MassMutual Longitudinal health data, stochastic imputation for the Sleep Regularity Index, and mixed-effects models of user biometrics.
  • 2026–Board Member, Local Motion Policy lead for safe streets and active transportation.
  • 2022–Graduate Research Assistant, Computational Ethics Lab, UVM
  • 2022–2024Graduate Teaching Assistant, UVM Co-instructed undergraduate Python and mentored 150+ students.
  • 2024–PhD, Computer Science, University of Vermont PhD candidate. MassMutual Research Fellow and Chernoff Fellowship.
  • 2024MS, Computer Science, University of Vermont
  • 2020BS, Electrical Engineering, Shiraz University