SpyStorage: A Highly Reliable Multi-Cloud Storage with Secure and Anonymous Data Sharing

Users outsourcing their critical data to cloud services has been increasingly popular recently. System reliability and data security have become the top priority to be concerned because of the possible service failures, unauthorized data access and privacy leaks in the cloud storage system. However, traditional single cloud storage service is far from meeting the demands because of the inevitable problems of data loss, vendor-lock in and privacy leaks during data storage and share. In this paper, a novel design is to be proposed and named by SpyStorage that offers users a highly reliable storage service and a secure anonymous data sharing mechanism based on Multi-Cloud by implementing the quorum protocol and utilizing the ABE/ABS cryptographic model. To the best of our knowledge, this is the first work using ABE and ABS to completely solve the issues in secret storing and sharing with anonymity simultaneously in the Multi- Cloud field. Extensive measuring experiments have proved that SpyStorage can achieve a relative high reliability with a low tradeoff of file transfer speed.