Although tree-based index structures, such as B+-trees, R-trees, have proven their advantages to both traditional and modern database applications, they introduce numerous research challenges as database services are outsourced to untrusted servers. In the outsourced database service (ODBS) model, the crucial security research questions mainly relate to data confidentiality, data and user priva...

Database outsourcing model is emerging as an important new trend beside the “application-as-aservice” model. In this model, since a service provider is typically not fully trusted, security and privacy of outsourced data are significant issues. These problems are referred to as data confidentiality, user privacy, data privacy, and query assurance. Among them, query assurance takes a crucial rol...

We study the problem of private outsourced sorting of encrypted data. We start by proposing a novel sorting protocol that allows a user to outsource his data to a cloud server in an encrypted form and then request the server to perform computations on this data and sort the result. To perform the sorting the server is assisted by a secure coprocessor with minimal computational and memory resour...

Providing secure and efficient access to large scale outsourced data is an important issue of cloud computing. In this paper, a mechanism FADE, a secure overlay cloud storage system, which will guarantee assured file deletion and improved access control for outsourced data is proposed. Cryptographic approach is used for storing and managing data..