الفهرس 
Cloud Computing Challenges
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Abstract
Cloud computing is a promising technology that provides dynamic allocation of computing resources from a resource pool. Also, it has useful characteristics such as power saving and low running cost. On the other hand, the security risks of cloud computing are a major concern that slows down its market growth. There are many frameworks for handling security risks of cloud computing, most of them trust cloud service provider and do not focus on the new types of security risks that might face the cloud. In this thesis, a new security framework for cloud computing is introduced that mainly tries to tackle these problems. The introduced framework does not trust the cloud service provider. Most current frameworks cannot detect the attacks that may come from cloud service provider side or due to vulnerabilities or attacks at the cloud service provider system. Mainly because they consider the cloud service provider as trusted entity. Hence, a framework is needed that can deal with these issues and transfer the trust away from the cloud service provider to another trustworthy party. The introduced framework in this thesis keeps the sensitive data encrypted and a trusted authority is the only one that is able to decrypt and process the sensitive data.