User authentication method and unmanned delivery system based on user authentication

An unmanned delivery system based on user authentication, comprising:

• a server;
• a buyer customer terminal;
• a deliveryman customer terminal;
• and
• an autonomous delivery vehicle,
• wherein the server is configured to generate a session key based on order information received from the buyer customer terminal and to transmit the session key to the buyer customer terminal and the deliveryman customer terminal,
• wherein the deliveryman customer terminal is configured to generate a first Quick Response (QR) code based on the session key, and the autonomous delivery vehicle is configured to recognize the first QR code,
• wherein the buyer customer terminal is configured to generate a second QR code based on the session key, and the second QR code is different from the first QR code, and
• wherein the autonomous delivery vehicle is further configured to autonomously drive to a destination based on destination coordinates included in the first QR code and to recognize the second QR code from the buyer customer terminal, and to open a door when the user authentication is completed.