Data sharing method and terminal based on block chain and attribute authorization mechanism

The invention discloses a data sharing method based on a block chain and attribute authorizations and a terminal, and the method comprises the steps: carrying out the fragmentation of a user side according to a regional relationship, obtaining different fragmented user sides, distributing a secret key to the fragmented user sides based on a distributed digital identity through a block chain of a multi-attribute authorizations, a data owning end is used for encrypting plaintext data based on a secret key and generating a ciphertext, a data using end is used for obtaining the ciphertext from the data owning end, and the secret key is used for decrypting the ciphertext to obtain the plaintext data, so that attribute authorization is carried out by utilizing a fragmentation thought, authorization is carried out in a place closer to a user end, the secret key distribution efficiency can be improved, and the user experience is improved. Meanwhile, the block chain technology, the multi-attribute authorization mechan