Proofs of Retrievability (PoR) are cryptographic proofs that enable a cloud provider to prove that the tenant can retrieve his file in its entirety. A tenant can ask the cloud provider to provide such proofs of a requested file without the need to download the file The aim of providing the PoR primitive is to provide strong assurance of storage integrity to the tenants.

Security Primitive: 
Storage Integrity with Proofs of Retrievability (PoR)
Security Requirements Addressed: