A New Blockchain-based Electronic Medical Record Transferring System with Data Privacy

From the current national-level medical diagnosis and treatment perspective, the paper-version prescription is still the only slip issued by the doctor to allow for the patient to take the prescribed medicine from the pharmacy store or clinic. However, the paper prescription is not easy to store and its confidentiality is low, if it is lost, it will cause unnecessary trouble to the patient. Therefore, the use of digital prescriptions has been considered for future electronic medical record reform. The challenges of digital prescriptions are also upfront, for instance, it contains a large amount of patient's medical record information and private information, how to effectively maintain the level of security while the premise of privacy has caused a series of hot issues, which become a major concerns of people who promote the use of digital prescriptions. In recent years, blockchain has been widely regarded as a promising online business data and transaction security technology. Due to its decentralization, security and credibility, collective maintenance, and non-tampering, it is widely used in data storage and sharing. This paper proposes a blockchain-based medical prescription system. At the same time, in order to effectively protect the privacy of patients, during this period we adapted the k-anonymity algorithm and incorporated a differential privacy protection mechanism to enhance its secured performance.