NETWORK-BASED USER AUTHENTICATION DEVICE, METHOD, AND PROGRAM THAT SECURELY AUTHENTICATE A USER'S IDENTITY BY USING A PRE-REGISTERED AUTHENTICATOR IN A REMOTE PORTABLE TERMINAL OF THE USER

摘要

A network-based user authentication device, method, and program securely authenticate a user's identity by using a pre-registered authenticator in a remote portable terminal of the user. The device, method, and program transmit an identity verification request that requests verification of the user's identity by a pre-registered authenticator to the remote portable terminal, and receive, in response to the verification request, authentication information from the remote portable terminal. The authentication information identifies the user of the remote portable terminal and includes a secret key. The device, method, and program validate the authentication information by comparing the received secret key with a validation code associated with the user in a memory, and, when the received secret key and the validation code associated with the user correspond, generate identity verification information confirming the identity of the user. The device, method, and program then transmit the generated identity verification information to the remote portable terminal.