Proof-of-Replication

Proof-of-Replication(PoRep), is a new kind of Proof-of-Storage, that can be used to prove that some data D has been replicated to its own uniquely dedicated physical storage. Enforcing unique physical copies enables a verifier to check that a prover is not deduplicating multiple copies of D into the same storage space. This construction is particularly useful in Cloud Computing and Decentralized Storage Networks, which must be transparently verifiable, resistant to Sybil attacks, and unfriendly to outsourcing.

Section 3.2 of the Filecoin Paper provides the original introduction to Proof-of-Replication.