research FedKNN Secure Federated k-Nearest Neighbor Search (SIGMOD '24) HIRE A Hybrid Learned Index for Robust and Efficient Performance under Mixed Workloads (SIGMOD '26) Privacy-Preserving ANN Search Oblivious approximate nearest neighbor search within Trusted Execution Environments (Under Review) VIDA — Authenticated ANN Search Verifiable graph-based ANN search via vector commitments and inner-product arguments (Under Review)