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Don't Stir the Pot! Authorized Vector Data Retrieval via Access-Aware Indexing
arXiv:2605.01342v3 Announce Type: replace Abstract: Vector databases increasingly enforce role-based access control, where each top-k approximate nearest neighbor query must return only vectors the querying role is authorized to access. Two extremes bracket the design space. A single global index built over all vectors avoids duplication but wastes search effort on unauthorized vectors and degrades recall, while an oracle index, built with all authorized vectors to the query roles, searches...