Inter-hospital electronic medical record access authentication protocol based on blockchains

Abstract

A method for inter-hospital identity authentication and electronic medical record transfer of patients is provided. Based on a blockchain technology, a patient achieves secure and efficient inter-hospital transfer authentication, and a new hospital accesses an electronic medical record with authorization of the patient, thus achieving reliable electronic medical record access controls. In each hospital, the patient, a medical server, and a doctor achieve efficient tripartite authentication and negotiation of session keys, and communicate based on the session keys. By introducing an elliptic curve to encrypt key parameters in an authentication process, a security of the entire authentication process is improved, and a computational pressure on a wireless device is reduced. In the authentication and the electronic medical record, the patient uses dynamic anonymity policies to protect privacy.