Anti-attack access control method, system and device based on block chain and medium

The invention discloses an anti-attack access control method, system and device based on a block chain and a medium, and the method comprises the steps that a data owner encrypts original medical data and uploads the data to a distributed interstellar file system; metadata is uploaded to the block chain through a data generation mechanism, and the metadata comprises the hash value information and data signature information; the data user sends an authorization request to obtain an access right to the original medical data of the data owner; the authorized data user obtains the encrypted original medical data from the block chain; and the encrypted original medical data is decrypted to obtain the original medical data, and the integrity of the original medical data is verified. The method can realize safe and efficient medical data sharing ecology, and can be widely applied to the technical field of block chains. 本发明公开了基于区块链的抗攻击访问控制方法、系统、设备及介质，方法包括：数据拥有者对原始医疗数据进行加密后，上传至分布式星际文件系统；通过数据生成机构将元数据上传至区块链，其中，所述元数据包括所述