PCBR achieves the optimal MPIR retrieval rate with substantially lower subpacketization by restricting demands to contiguous blocks and constructing explicit balanced linear schemes.
Private Information Retrieval and Its Extensions: An Introduction, Open Problems, Future Directions
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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.
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Private Contiguous-Block Retrieval
PCBR achieves the optimal MPIR retrieval rate with substantially lower subpacketization by restricting demands to contiguous blocks and constructing explicit balanced linear schemes.
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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.