Secured Cloud Storage using Blockchain Technology

Computer Enginering

There are many security issues related to cloud data storage and sharing now-a-days. Security of cloud storage can be achieved more efficiently by using this system. To protect the confidentiality of sensitive data while supporting de-duplication, the convergent encryption technique has been proposed to encrypt the data before outsourcing. To better protect data security, the first attempt to formally address the problem of authorized data deduplication. In this system the data is divided into blocks using block chain technology and each block has unique hash value and the hash value of current block will be stored in previous block. If any unauthorized person tries to access the data the hash value will get changed and the link will be broken for further blocks. The data deduplication can be avoided and data integrity can be maintained. AES algorithm is used for encryption purpose and ‘k-n secret sharing’ and ‘SHA’ algorithm is used for hashing purpose and data distribution purpose. Security analysis demonstrates that our scheme is secure in terms of the definitions specified in the proposed security model. Using this system, the security can be achieved during data sharing and storage over cloud computing.

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