Privacy-Aware Data Storage In Cloud Computing

The increasing number of cloud storage services like Dropbox or Google Drive allows users to store more and more data on the Internet. However, these services do not give users enough guarantees in protecting the privacy of their data. In order to limit the risk that the storage service scans user documents, for example, for commercial purposes, we propose a storage service that stores data on several cloud providers while prohibing these providers to read user documents. Indeed, the proposed sky storage service (i.e., a service composed of several cloud services) named SkyStore, protects the user privacy by breaking user documents into blocks and spreading these blocks over many cloud storage providers. The architecture of this service ensures that SkyStore can not read user documents. It connects directly users to cloud providers in order to avoid trusting a third-party. This paper consists of two parts. First, the sky service architecture is described to detail the different protections provided to secure user documents. Second, the consequences of this architecture on the performance are discussed.