Revisiting Hybrid Private Information Retrieval
Daniel Günther, Thomas H. Schneider, Felix Wiegand · 2021
Private Information Retrieval (PIR) allows a client to request entries from a public database held by k servers without revealing any information about the requested data to the servers. PIR is classified into two classes: (i) Multi-server PIR protocols where the request is split among k≥2 non-colluding servers, and Single-server PIR protocols where exactly k=1 server holds the database while the query is protected via certain computational hardness assumptions.