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Abstract
In today’s world, cloud computing plays an important role. It provides user with many services and facilities like software, platform, and infrastructure services. By using cloud computing user can access resources from anywhere, anytime whenever they need it. One of the factors for cloud computing is cloud services such as IAAS, PAAS, and SAAS. Resources get allocated according to the customer requirements, but many of them thinks that it is unsafe to use cloud services. It is said to be unsafe because there is no guarantee that all the information which is stored in cloud is secured and protected. Now a days, a major challenges in this cloud technology is security. Data stored in the cloud by the customers must be kept safe and should be easily accessible. Here we discuss about the various security issues in the data storage and challenges in cloud computing.