This article describes how a Redundant Array of Independent Net-storages (RAIN) can be deployed for confidentiality\r\ncontrol in Cloud Computing. The RAIN approach splits data into segments and distributes segments between\r\nmultiple storage providers; by keeping the distribution of segments and the relationships between the distributed\r\nsegments private, the original data cannot be re-assembled by an observer. As long as each segment is small enough,\r\nan individual segment discloses no meaningful information to others, and hence RAIN is able to ensure the\r\nconfidentiality of data stored in the clouds. We describe the inter-cloud communication protocol, and present a\r\nformal model, security analysis, and simulation results.
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