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Cumulus: Blockchain-Enabled Privacy Preserving Data Audit in Cloud. (arXiv:1904.12362v2 [cs.CR] UPDATED)
cs.CR updates on arXiv.org arxiv.org
Data owners upload large files to cloud storage servers, but malicious
servers may potentially tamper data. To check integrity of remote data, Proof
of Retrievability (PoR) schemes were introduced. Existing PoR protocols assume
that data owners and third-party auditors are honest and audit only the
potentially malicious cloud server to check integrity of stored data. In this
paper we consider a system where any party may attempt to cheat others and
consider collusion cases. We design a protocol that is …
audit blockchain check cloud cloud storage cumulus data files integrity large malicious may party privacy privacy preserving protocols server servers storage third third-party