Cloud computing is a flexible environment for availing services from cloud through internet on demand. The security issue will reduce the growth of cloud. The data security is a complex problem during adaption of cloud by the users. The existing solutions for the security are considered for analysis. Different types of attacks in the cloud are considered in this survey. Cloud users must understand and vigilant about the risk of data breaches in this environment. A new model required for improving the features of an existing model. The security is a very complex problem in the cloud during the lifetime of the data. The methods for solving this problem is to implement the security as a new service to the users on demand, frequently verify the threats in cloud data and try to resolve it by new methods.
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