7 papers · 1 filter
HetDAPAC: Leveraging Attribute Heterogeneity in Distributed Attribute-Based Private Access Control
Shreya Meel, Sennur Ulukus
Verifying user attributes to provide fine-grained access control to databases is fundamental to attribute-based authentication. Either a single (central) authority verifies all the…
Effect of Full Common Randomness Replication in Symmetric PIR on Graph-Based Replicated Systems
Shreya Meel, Sennur Ulukus
We revisit the problem of symmetric private information retrieval (SPIR) in settings where the database replication is modeled by a simple graph. Here, each vertex corresponds to a…
Multi-Agent Distributed Optimization With Feasible Set Privacy
Shreya Meel, Sennur Ulukus
We consider the problem of decentralized constrained optimization with multiple agents who jointly wish to learn the optimal solution set while keeping their feasi…
What If, But Privately: Private Counterfactual Retrieval
Shreya Meel, Mohamed Nomeir, Pasan Dissanayake +2
Transparency and explainability are two important aspects to be considered when employing black-box machine learning models in high-stake applications. Providing counterfactual exp…
Symmetric Private Information Retrieval (SPIR) on Graph-Based Replicated Systems
Shreya Meel, Sennur Ulukus
We introduce the problem of symmetric private information retrieval (SPIR) on replicated databases modeled by a simple graph. In this model, each vertex corresponds to a server, an…
New Capacity Bounds for PIR on Graph and Multigraph-Based Replicated Storage
Xiangliang Kong, Shreya Meel, Thomas Jacob Maranzatto +2
In this paper, we study the problem of private information retrieval (PIR) in both graph-based and multigraph-based replication systems, where each file is stored on exactly two se…
Private Information Retrieval on Multigraph-Based Replicated Storage
Shreya Meel, Xiangliang Kong, Thomas Jacob Maranzatto +2
We consider the private information retrieval (PIR) problem for a multigraph-based replication system, where each set of files is stored on two of the servers according to an u…