Stacked DRG PoRep State Theory Audit Edit this section section-algorithms.porep-old.stacked_drg This section describes Stacked DRG PoRep (SDR), the specific Proof-of-Replication (PoRep) used in Filecoin. In this construction, the prover encodes the original data into a replica and commits to it. An offline PoRep proves that the commitment to the replica is a valid commitment of the encoded original data.