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Title:
OnionPIRv2: Efficient Single-Server PIR
Authors: Yue Chen, Ling Ren
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 $2.5$x-$3.6$x response overhead for databases with moderately large entries (around 4 KB or above) and up to 1600 MB/s server computation throughput.
ePrint: https://eprint.iacr.org/2025/1142
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