Technology has evolved over the years, making our lives easier. It has impacted the healthcare sector, increasing the average life expectancy of human beings. Still, there are gaps that remain unaddressed. There is a lack of transparency in the healthcare system, which results in inherent trust problems between patients and hospitals. In the present day, a patient does not know whether he or she will get the proper treatment from the hospital for the fee charged. A patient can claim reimbursement of the medical bill from any insurance company. However, today there is minimal scope for the Insurance Company to verify the validity of such bills or medical records. A patient can provide fake details to get financial benefits from the insurance company. Again, there are trust issues between the patient (i.e., the insurance claimer) and the insurance company. Blockchain integrated with the smart contract is a well-known disruptive technology that builds trust by providing transparency to the system. In this paper, we propose a blockchain-enabled \emph{Secure and Smart HealthCare System}. Fairness of all the entities: patient, hospital, or insurance company involved in the system is guaranteed with no one trusting each other. Privacy and security of patient's medical data are ensured as well. We also propose a method for privacy-preserving sharing of aggregated data with the research community for their own purpose. Shared data must not be personally identifiable, i.e, no one can link the acquired data to the identity of any patient or their medical history. We have implemented the prototype in the Ethereum platform and Ropsten test network, and have included the analysis as well.

中文翻译：

---

基于区块链的安全智能医疗保健系统

多年来，技术不断发展，使我们的生活更轻松。它影响了医疗保健行业，提高了人类的平均预期寿命。尽管如此，仍有一些差距尚未解决。医疗保健系统缺乏透明度，导致患者与医院之间存在固有的信任问题。在当今，患者不知道他或她是否会从医院获得适当的治疗，并收取一定的费用。患者可以向任何保险公司要求报销医疗费用。然而，今天保险公司验证此类账单或医疗记录有效性的空间很小。患者可以提供虚假详细信息以从保险公司获得经济利益。同样，患者之间存在信任问题（即，保险索赔人）和保险公司。与智能合约集成的区块链是一种众所周知的颠覆性技术，它通过为系统提供透明度来建立信任。在本文中，我们提出了一个支持区块链的\emph{安全和智能医疗保健系统}。所有实体的公平性：参与系统的患者、医院或保险公司都得到保证，没有人相互信任。患者医疗数据的隐私和安全也得到了保证。我们还提出了一种保护隐私的方法，用于与研究社区共享聚合数据，用于他们自己的目的。共享数据不得用于个人身份识别，即没有人可以将获取的数据与任何患者的身份或其病史联系起来。我们已经在以太坊平台和 Ropsten 测试网络中实现了原型，