Study on data security mechanism in cloud computing

Data integrity protection in outsourced data is challenging task in cloud computing. Client or third party auditor need to check the integrity of outsourced data. For this purpose so many approaches are introduced with different types of algorithms such as Proof of Retrievablity, provable data possession, privacy preserving, etc. This extensive paper aims to make comparative analysis on RSA based homomorphic and BLS based homomorphic by time factor and produce the best algorithm for data protection as well as time consuming. Which is used to the cloud user choose the best mechanism based on their resource and requirements and help to make their integrity checking process effectively.