TalinAzarian Azarian - Department of Computer Engineering ,Technical and Engineering Faculty ,Saveh Branch , Islamic Azad University, Saveh
Amir Shahab Shahabi - Department of Computer Engineering, Technical and Engineering Faculty,South Tehran Branch, Islamic Azad University, Tehran

Cloud computing technologies reduces costs associated with computing while increasing theflexibility and scalability for computer processes. However, cloud based services have manymajor problems of information policy, including issues of privacy, security, reliability, access,and regulation, of which security is the most important one. Traditional security frameworkconsists of three essential levels – Operating systems, Services and Application level. Webservices contribute a new level in the framework and this new level is the business applicationlayer. Since the web services communicates with each other by using an XML-based messageknown as SOAP, this research focusses on the security of web application level and furtherexploits the attack ambiguous factors and then proposes a solution based-on data mining bycleaning the outlier data in order to detect the attack in the XML message. And finally, byrecognition of data distribution of a content, the changes in the XML code will be detected inorder to avoid related attacks.

Cloud Computing Security, Data Mining and Cloud Computing, XML Rewriting Attack, Coercive Parsing Attack