Web security has evolved along with the Web itself, and the varying threats and attacks that need to be controlled at any one time. Initially, the biggest threat to people using the Web was one of accidentally viewing inappropriate content. Cloud computing is the provision of dynamically scalable and often virtualized resources as a service over the Internet on a utility basis. Cloud computing services often provide common business applications online that are accessed from a web browser, while the software and data are stored on the servers. As the cloud computing it self is the composition of different web spaces that are physically distibuted, because of this it require more securiity in terms of their integration.

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