Vehicle-mounted Ethernet dynamic login authentication method and system based on vehicle-mounted terminal

The invention provides a vehicle-mounted Ethernet dynamic login authentication method and system based on a vehicle-mounted terminal, and the method comprises the steps: enabling the vehicle-mounted terminal to request to be connected with a background server for the first time, carrying out the identity verification through a preset public key, downloading a corresponding private key after the verification succeeds, and carrying out the signature; when the vehicle-mounted terminal receives identity authentication requests of other nodes, a random authentication code is generated; the vehicle-mounted terminal calculates the random authentication code through a preset verification algorithm to obtain a first authentication sequence; other nodes calculate the random authentication code through a preset verification algorithm to obtain a second authentication sequence; and comparing the first authentication sequence with the second authentication sequence, if the first authentication sequence and the second auth