Enhancing Cloud Storage Security in Big Data: A Comprehensive Data Sharing Protocol

Abstract

A cloud based system gives advantage of a storage facility provided by a cloud service provider for exchange of data with authorised users. cloud providers store shared data in huge data centres outside the data owner's trust zone, which may raise the issue of data confidentiality. Number of parties, devices, app in cloud increases so number of access point also increases and making perfect access access control is challenging, so cloud data subject to being deleted or can be modified by cloud service provider. This article offers a secret sharing group key management protocol (SSGK) to prevent unwanted access in the communication process and shared data. in SSGK, group key is utilised to encrypt the shared data, and a secret sharing mechanism is employed to distribute the group key. security and performance evaluations show that our approach significantly reduces the security and privacy concerns of data sharing in cloud storage. Keywords : Big data, Security and Privacy, Cloud Storage, Data Sharing, Encryption, Decryption.