PSSR generalizes MPIR to structured demand families, derives converse bounds on rate and subpacketization, and provides an optimization framework that recovers known MPIR schemes while improving on them for restricted demands.
The Linear Capacity of Single-Server Individually-Private Infor- mation Retrieval with Side Information
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Private Structured-Subset Retrieval
PSSR generalizes MPIR to structured demand families, derives converse bounds on rate and subpacketization, and provides an optimization framework that recovers known MPIR schemes while improving on them for restricted demands.