Data transaction method based on trusted execution environment and threshold signature

The invention discloses a data transaction method based on a trusted execution environment and a threshold signature. The method comprises the following steps: a data buyer views seller data through a metadata market, selects target data, initiates a transaction, generates a public key address and a private key address of the transaction through the trusted execution environment, carries out the secret key fragmentation to obtain key fragments; the key fragments are sent to a platform service provider, a data buyer and a data seller through a trusted channel, target data are sent to the data buyer and checked and confirmed, and after the data buyer and the data seller sign and aggregate signatures, the data seller receives the transferred token to complete the transaction. The method is combined with the block chain technology, the mode of combining the threshold signature and the trusted execution environment is adopted, compared with a traditional method that a trusted third party generates transaction info