Paper 2025/1142

OnionPIRv2: Efficient Single-Server PIR

Yue Chen, University of Illinois Urbana-Champaign
Ling Ren, University of Illinois Urbana-Champaign
Abstract

This paper presents OnionPIRv2, an efficient implementation of OnionPIR incorporating standard orthogonal techniques and engineering improvements. OnionPIR is a single-server PIR scheme that improves response size and computation cost by utilizing recent advances in somewhat homomorphic encryption (SHE) and carefully composing two lattice-based SHE schemes to control the noise growth of SHE. OnionPIRv2 achieves 2.5x-3.6x response overhead for databases with moderately large entries (around KB or above) and up to MB/s server computation throughput.

Metadata
Available format(s)
PDF
Category
Cryptographic protocols
Publication info
Preprint.
Keywords
Private Information Retrieval
Contact author(s)
yuec12 @ illinois edu
renling @ illinois edu
History
2025-06-19: approved
2025-06-17: received
See all versions
Short URL
https://ia.cr/2025/1142
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2025/1142,
      author = {Yue Chen and Ling Ren},
      title = {{OnionPIRv2}: Efficient Single-Server {PIR}},
      howpublished = {Cryptology {ePrint} Archive, Paper 2025/1142},
      year = {2025},
      url = {https://eprint.iacr.org/2025/1142}
}
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