PMAB: A Public Mutual Audit Blockchain for Outsourced Data in Cloud Storage

Abstract

With the rapid growth of data, limited by the storage capacity, more and more IoT applications choose to outsource data to Cloud Service Providers (CSPs). But, in such scenarios, outsourced data in cloud storage can be easily corrupted and difficult to be found in time, which brings about potential security issues. Thus, Provable Data Possession (PDP) protocol has been extensively researched due to its capability of supporting efficient audit for outsourced data in cloud. However, most PDP schemes require the Third-Party Auditor (TPA) to audit data for Data Owners (DOs), which requires the TPA to be trustworthy and fair. To eliminate the TPA, we present a Public Mutual Audit Blockchain (PMAB) for outsourced data in cloud storage. We first propose an audit chain architecture based on Ouroboros and an incentive mechanism based on credit to allow CSPs to audit each other mutually with anticollusion (any CSP is not willing to help other CSPs conceal data problems). Then, we design an audit protocol to achieve public audit efficiently with low cost of audit verification. Rigorous analysis explains the security of PMAB using game theory, and performance analysis shows the efficiency of PMAB using the real-world dataset.

Integration and Development of Enterprise Internal Audit and Big Data Based on Data Mining Technology

“…e sampling audit of nancial and commercial data by the audited unit is the basis of daily audit work. According to the information about data, it becomes important to nd potentially useful information from a large amount of disorderly data [1,2]. erefore, nding the really valuable things from these huge data and providing clues and basic methods for the inspectors to discover problems is a relatively urgent issue for the audit departments of many companies.…”

Improved Efficient Privacy-Preserving Certificateless Provable Data Possession Scheme for Cloud Storage

“…After the user stores the lightweight verification tags into the blockchain, the Merkle hash tree is constructed through the tags to generate the proof, so as to save computational power. Yang et al [26] provided the mutual blockchain for outsourced cloud data and proposed an incentive mechanism based on credit, so that CSPs can supervise each other, which prevents collusion and realizes public audit efficiently. Yang et al [27] proposed a certificateless multicopy and multicloud data public audit scheme based on blockchain technology.…”