Ruofan Xia

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—From an enterprise perspective, one key motivation to transform the traditional IT management into Cloud is the cost reduction of the hosted services. In an Infrastructure-as-a-Service (IaaS) Cloud, virtual machine (VM) instances share the physical machines (PMs) in the provider's data center. With large number of PMs, providers can maintain low cost of(More)
—The explosive growth of data generation and increasing reliance of business analysis on massive data make data loss more damaging than ever before. Nowadays many organizations start relying on cloud services for keeping their valuable data. It is a critical issue for cloud service provider to protect the data for individual users securely and effectively.(More)
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