Abstract
In general, Cloud storage is considered as a distributed model. Here, the data is usually stored on remote servers to properly maintain, back up and make it accessible to clients over a network, whenever required. Cloud storage providers keep the data and processes to oversee it on capacity servers based on secure virtualization methods. A security framework is proposed for auditing the cloud data, which makes use of the proposed blockchain technology. This ensures to efficiently maintain the data integrity. The blockchain structure inspects the mutation of operational information and thereby ensures the data security. Usually, the data auditing scheme is widely used in a Third Party Auditor (TPA), which is a centralized entity that the client is forced to trust, even if the credibility is not guaranteed. To avoid the participation of TPA, a decentralised scheme is suggested, where it uses a smart contract for auditing the cloud data. The working of smart contracts is based on blockchain. Ethereum is used to deploy a smart contract thereby eliminating the need of a foreign source in the data auditing process.
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