Individual Internet of Things high-sensitive data right confirmation method and device based on block chain and NFT

The invention provides a block chain and NFT-based personal Internet of Things high-sensitive data right confirmation method. The method comprises the following steps: a CA server issues identity certificates to a user and a right confirmation server respectively; a user is connected with the Internet of Things equipment through the intelligent control terminal, and when high-sensitivity data is generated, a data right confirmation request is initiated to the right confirmation server; the right confirmation server carries out NFT certification processing on the high-sensitivity data to be subjected to right confirmation in sequence to generate metadata and temporarily stores the metadata to a local cache region; the right confirmation server monitors the network state of the block chain in real time, and data right confirmation transactions are sequentially sent to the block chain nodes from the metadata in the local cache region according to a sequence; and the block chain node obtains metadata, calculates