AUTHENTICATION METHOD, EDGE NODE AND AUTHENTICATION SERVER

PROBLEM TO BE SOLVED: To achieve highly reliable authentication without performing the notification/application of an MAC (Media Access Control) address.SOLUTION: When receiving a service request from an information terminal device, a first edge node which stores an access line with which a user makes a contract acquires storage information and an MAC address of the information terminal device, and transmits an authentication request including them to an authentication server. The authentication server compares storage information preliminarily stored in storage means with the storage information included in the authentication request to perform first authentication, and when the first authentication succeeds, stores the MAC address in the storage means as connection result information. When receiving the service request from the information terminal device, a second edge node which stores an access line other than the access line transmits the authentication request including the MAC address of the information terminal device to the authentication server. The authentication server compares the MAD address stored in the storage means with the MAC address included in the authentication request to perform second authentication.