Applying Universal Searchable Encryption Scheme for Providing Security in Cloud Storage

A key challenge to planning such cryptography schemes lies within the economical management of cryptography keys. The desired flexibility of sharing any cluster of elect documents with any cluster of users demands totally different cryptography keys to be used for various documents. However, this also implies the necessity of securely distributing to users a large number of keys for both encryption and search, and those users will have to securely store the received keys, Associate in Nursing submit an equally sizable amount of keyword trapdoors to the cloud so as to perform search over the shared knowledge. The tacit want for secure communication, storage, and complexness clearly renders the approach impractical. In this paper, we tend to address this sensible downside, that is basically neglected within the literature, by proposing the novel concept of key-aggregate searchable encryption and instantiating the concept through a concrete KASE theme, in which a data owner only needs to distribute a single key to a user for sharing a large number of documents, and the user only needs to submit one trapdoor to the cloud for querying the shared documents. The security analysis and performance analysis each ensure that our planned schemes square measure incontrovertibly secure and much economical.