Protocols and their interactions

Protocol	Proves Space N	Stores Data	Short Input	Efficient Verifier	Persistent Space
PDP - Proof of Data Possession	no	yes	no	yes	no
PoR - Proof of Retrievability	no	yes	no	yes	no
PoSE - Proof of Secure Erasure	yes	yes	yes	no	no
PoPS - Proof of Persistent Space	yes	no	yes	yes	yes
PoS - Proof of Useful Space/ PoRep - Replication	yes	yes	yes	yes	yes