Two-level security in shared m-healthcare system using OwnCloud

Shared m-healthcare cloud computing system provides systematic medical treatment to the patient. The problem is to achieve both the data confidentiality and patient's individuality privacy at the same time. In this paper, shared m-Healthcare system is established using OwnCloud. OwnCloud provides ubiquitous file access through a single disperate of our system. Using an access tree with threshold predicates, patients can authorize physicians. The ciphertext policy-attribute based designated verifier signature (CP-ADVS) scheme is devised to provide security. The physicians decrypt the physical characteristics of the patient and confirm patient's proofs by fulfilling the access structure with their own attribute sets. Simulation results demonstrate our system can reduces the storage cost.