Online rapid identity authentication system and method based on block chain smart contract

The invention discloses an online rapid identity authentication system and method based on a block chain smart contract in the technical field of block chain smart contracts and FIDO identity authentication systems, and the method comprises the steps: firstly constructing a block chain network, and deploying the smart contract in the block chain network; and then the smart contract is connected with the block chain module, the FIDO identity authentication module and the key certificate management center module. The key certificate management center module generates a bit string with the length of 256 bits as a private key through a hash function algorithm, generates a corresponding public key through an elliptic curve digital signature algorithm in an asymmetric encryption algorithm, and generates an address through a one-way hash function; and the verifier carries out digital signature by using the private key of the verifier, and the online terminal server carries out decryption by using the public key corr