A secure and efficient role-based access policy towards cryptographic cloud storage

摘要: Cloud Storage, which provides cost-efficient and scalable storage services, has emerged as a hot paradigm today. As promising it is, Storage also brings forth security challenges. Sensitive data may be outsourced for sharing on cloud servers, are not within the same trusted domain owner (DO). To keep confidential against unauthorized parties, cryptographic access control must applied. Existing methods usually require policies fully managed by DO, could lead to DO-side bottleneck. This paper addressed issue implementing Role-Based Access Control via CP-ABE. The divided into two parts: Permission Assignments (PAs) Role (RAs), we develop an approach called propagation allow RAs handled effectively users besides DO. Since most of dynamic in triggered RAs, bottleneck successfully avoided.