2 papers
cs.AI2026
PILLAR: Private Inverted-Index Lexical Lookup for Augmented Retrieval
Truong Son Nguyen, Daniel Blackley, Ni Trieu +1
Retrieval-augmented generation (RAG) hands the user's query to whoever hosts the corpus. We propose PILLAR, a Privacy-Preserving RAG (PPRAG) system based on Private Information Ret…
cs.CR2025
How Query Distribution Knowledge Breaks Multidimensional Encrypted Range Queries, With Guarantees
Daniel Blackley, Nathaniel Moyer, Charalampos Papamanthou +1
In this work, we show how knowledge of the query distribution, combined with access-pattern leakage, is sufficient to break multi-dimensional encrypted range queries, with provable…