Date of Publication :6th June 2017

Abstract: CLOUD computing is a subversive technology that is changing the way IT hardware and software are designed and purchased. Cloud computing provides abundant benefits including easy access, decreased costs, quick deployment and flexible resource management, etc. It has become highly popular for data owners to outsource their data to public cloud servers while allowing data users to retrieve this data. For privacy concerns, a secure search over encrypted cloud data has motivated several research works under the single owner model. However, most cloud servers in practice do not just serve one owner; instead, they support multiple owners to share the benefits brought by cloud computing. In this paper, we propose Dynamic Secret key generation for multi user in cloud computing. To enable cloud servers to perform secure search without knowing the actual data of both keywords and trapdoors, we systematically construct a novel secure search protocol. To rank the search results and preserve the privacy of relevance scores between keywords and files, we propose a novel additive order and privacy preserving function family. To prevent the attackers from eavesdropping secret keys and pretending to be legal data users submitting searches, we propose a novel dynamic secret key generation protocol and a new data user authentication protocol

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