Attribute and policy hiding access control method based on block chain

The invention belongs to the field of block chain-based access control, and particularly relates to a block chain-based attribute and strategy hiding access control method, which comprises the following steps of: initializing a network and creating a certificate for a node; the access request chain code, the resource information management chain code and the attribute management chain code are installed in a block chain network and are initialized; the data owner encrypts plaintext data and uploads the encrypted plaintext data to the IPFS network to obtain a storage address; the data owner initiates a registration request to an attribute authentication mechanism, and the attribute authentication mechanism allocates attributes to the data owner, encrypts the attributes and uploads the attributes to a block chain network through an attribute management chain code; the data owner calls the resource information management chain code to upload the resource hash value, the storage address and the access strategy en