Proofs of Retrievability (POR) is a cryptographic method for remotely auditing the integrity of files stored in the cloud, without keeping a copy of the original files in local storage. In a POR scheme, a user Alice backups her data file together with some authentication data to a potentially dishonest cloud storage server Bob. Later, Alice can periodically and remotely verify the integrity of ...

For data storage outsourcing services, it is important to allow users to efficiently and securely verify that cloud storage servers store their data correctly. To address this issue, a number of Proof of Retrievability (POR) and Proof of Data Possession (PDP) schemes have been proposed wherein servers must prove to a verifier that data are stored correctly. While existing POR and PDP schemes of...

Proofs of Data Possession (PoDP) scheme is essential to data outsourcing. It provides an efficient audit to convince a client that his/her file is available at the storage server, ready for retrieval when needed. An updated version of PoDP is Proofs of Retrievability (PoR), which proves the client’s file can be recovered by interactions with the storage server. We propose a PoDP/PoR scheme base...

Cloud storage has been gaining popularity because its elasticity and pay-as-you-go manner. However, this new type of storage model also brings security challenges. This paper studies the problem of how to ensure data integrity in cloud storage systems. In the Proof of Retrievability (PoR) model, after outsourcing the preprocessed data to the server, the client will delete its local copies and o...

Proofs of Retrievability are protocols which allow a Client to store data remotely and efficiently ensure, via audits, that the entirety is still intact. Dynamic (DPoR) also support efficient retrieval update any small portion data. We propose novel protocol for arbitrary outsourced storage achieves both low remote size audit complexity. A key ingredient, can be intrinsic interest, reduces eval...

Conceiving of nuclear energy as a social experiment gives rise to the question of what to do when the experiment is no longer responsible or desirable. To be able to appropriately respond to such a situation, the nuclear energy technology in question should be reversible, i.e. it must be possible to stop its further development and implementation in society, and it must be possible to undo its ...