Privacy-enhanced fair block chain leader election method and device

The invention discloses a privacy-enhanced fair block chain leader election method and device. The method comprises the following steps: generating a corresponding number of one-time public and private key pairs according to the maximum election votes of an election node, and establishing a one-time public key set of the node; signing one-time public keys in the one-time public key set one by one through the element private key of the election node to generate an election node commitment result, and establishing a one-time public key list according to the one-time public keys corresponding to the election node commitment result passing verification; calculating a linkable ring signature according to the one-time private key of the election node and a public key ring of the one-time public key list, and generating a vote of the election node according to the linkable ring signature; and calculating the votes passing the verification by using a preset random number to obtain a vote sequence, and selecting a lea