A Privacy-Preservation Scheme based on Mobile Terminals in Internet Medical

Since the 21st century, Internet technologies have entered a stage of rapid developments, and gradually been widely used in various industries. Internet Medical is gradually matured and used widely. Aiming at the problems such as the easy leakage of privacy in mobile medical equipment and untrustworthy data, we make use of a role-separated mechanism to generate trusted anonymous certificates and propose a lightweight identity authentication scheme to protect the medical data security. It reduces the calculation cost. Meanwhile, in view of problems of transparency and visibility of blockchain information, we adapt searchable encryption algorithm to realize ciphertext processing in the whole life cycle. Experiments show that our scheme can reduce the cost of computation on basis of ensuring traffic. In process of dynamic updating of ciphertext keywords, except the keyword identifier, less information is leaked to the server, which protect users’ privacy.