Author

Evgenios M. Kornaropoulos

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#artificial intelligence Preprint Sep 2026

PILLAR: Private Inverted-Index Lexical Lookup for Augmented Retrieval

PILLAR is a Privacy-Preserving RAG system based on Private Information Retrieval (PIR) in which a client utilizes the k documents most similar to their query from a server-held and publicly known corpus to respond to their query, while the server learns nothing about the query, either its terms or its access pattern.

Truong Son Nguyen, D. Blackley, Ni Trieu et al. · 0 citations

#artificial intelligence Preprint Sep 2026

HEAT: Faster Fully Homomorphic Inference via Approximations-Weights Co-Adaptation

This work introduces Homomorphic Encryption-Aware Training (HEAT), a fine-tuning method that makes the per-nonlinearity iteration counts learnable, enabling them and the model weights to co-adapt during training.

Alessandro Zirilli, Davide Marincione, E. Kornaropoulos et al. · 0 citations