A Secure and Efficient Medical Data Sharing Protocol for Cloud-Assisted WBAN

The cloud-assisted wireless body area network (WBAN) can further the development of the telemedicine, providing larger health data storage space and more powerful computing capabilities for telemedicine. Under the cloud-assisted WBAN architecture, users' health data is uploaded to a cloud server so that medical staffs can download it and analyze the users' health status. The sharing of health data between users and medical staffs provides users with better healthcare services. However, the sharing of health data introduces new privacy and security issues. To address these issues, a secure medical data sharing protocol is presented based on a new certificateless proxy re-encryption scheme without pairing. The security analysis shows that the protocol achieves the security requirements in cloud, and the performance analysis illustrates that it is more efficient than other schemes.