Towards auditable cloud-assisted access of encrypted health data

Motivated by the privacy issues curbing the adoption of electronic healthcare systems and the wild success of cloud service models, we propose to build privacy into electronic healthcare systems with the help of private cloud. Our system offers salient features including privacy-preserving data access, especially during emergencies, and auditability for misusing health data. Specifically, we propose to integrate the concept of attribute-based encryption with threshold signing for providing role-based access control with auditability to prevent potential misbehavior, in both normal and emergency cases.