Privacy-Preserving Data Sharing Framework for High-Accurate Outsourced Computation

With the advances of outsourced computation, the threats of data leakage and loss of computational accuracy over rational domain are attracting increasing concerns. In this paper, we propose a framework for Privacy-preserving Data Sharing and high-accurate outsourced Computation system, referred as PDSC. PDSC system can perform secure data sharing with multiple data providers. Besides, the original data and computed results in the rational field can be securely processed and stored in the cloud without privacy leakage. Specifically, we design privacy-preserving computation protocols over rational numbers to guarantee computational accuracy and handle outsourced operations on-the-fly. Detailed security analysis and experimental results demonstrate that PDSC system is secure and feasible, respectively.