The phrase “proof-of-replication” (PoRep), which is frequently used in connection with Filecoin, refers to the process by which a storage miner demonstrates to the Filecoin (or other) network that they possess an absolutely unique duplicate of a piece of data kept for the network.
Within a proof-of-space mechanism, proof-of-replication functions as a proof-of-retrievability mechanism. What does that mean in reality? PoRep enables a “prover” to demonstrate that they are actually and genuinely using storage space to store copies of a piece of information or data. Additionally, PoRep indicates that the data the prover is keeping can be quickly accessed, or “retrieved”.