Research on security methods of blockchain and IPFS telemedicine

The massive infection of COVID-19 has caused inconvenience to people's lives, such as the difficulty of seeking medical treatment, the inconvenience of medical academic exchanges and sharing, and the imbalance of medical resources, which has resulted in telemedicine. At present, telemedicine data is still mainly stored in centralized mode, transmitted over Internet Protocol (IP) and issued by Certificate Authority (CA),which leads to low data security, delayed network communication and high maintenance cost of CA. This paper proposes a SMSSS-CA mechanism signature, smart contract and private blockchain to solve the problems of high maintenance cost of CA and low privacy disclosure and security of medical data. In addition, the Named Data Network (NDN) is proposed to integrate InterPlanetary File System (IPFS), alliance blockchain and smart contracts to improve the response speed of obtaining patient records and sharing consultation information when the SMSSS-CA mechanism signs or verifies signatures during remote consultations, and reduce the blockchain propagation cost. Experiments were conducted to compare NS3 and NDNSIM experimental environments, and the results show that this method is safer and more timely than the existing schemes.