Authentication method and device

Abstract

[PROBLEM] Person authentication and authentication device of the present invention aims at providing a user with services of easy, inexpensive, highly secure, and reliable person authentication. [MEANS TO SOLVE THE PROBLEMS] Authentication method adopted by the present invention comprises: a step that forwards to a communication device of a user a registration identifier that identifies the user and/or the communication device by including the identifier in an address of registration screen peculiar to the user and/or the communication device; and a step that, when the address is accessed, and a first password is entered and replied to the registration screen, authenticates the user based on the registration identifier and the first password; and a step that sends a login screen display to the user when the authentication step is successful, which the step is comprised of a step where the login screen display comprises a field for entering a second password, and a login identifier to identify the user and/or the communication device; and a step that authenticates the user based on the login identifier contained in the login screen display replied by the user, and the second password.

Dependencies are inferred from the claim text.