Patent ID: 9338619
Filing Date: 2016-05-10
CPC Classification: H04L,H04M,H04W

Claim Text:
1. A user authentication system using call identification information, comprising: a contents service provision server having a processor and a memory which provides a contents service through a wired/wireless communication network and provides a restricted service through approval authentication; a first user terminal which accesses the contents service provision server to request a service requiring the approval authentication; an authentication server having a processor and a memory which makes a call to the first user terminal with a corresponding stored terminal number upon receiving a request for approval authentication from the contents service provision server, with approval authentication-related call identification information as caller information indication displayed at the same time of call incoming, provides a voice guidance during call connection, receives an approval number as an audio signal, and delivers a result of the approval authentication to the contents service provision server; a second user terminal which displays the call identification information on a display screen upon receiving a call from the authentication server, informs the authentication server of contents of the incoming call, and delivers an approval number input, corresponding to the approval number, under a call connection state, as an audio signal, to the authentication server; and a data comparator which receives the approval number from the second user terminal during the call connection state, compares the received approval number with a stored approval number to determine whether or not the received approval number input matches the stored approval number, and transmits a result of the determination to the contents service provision server, wherein the approval authentication-related call identification information is a character, an image or a combination thereof to allow a user to confirm the contents of the incoming call, wherein the received approval number comprises user-related information stored in the authentication server by the user, and wherein the one-time ID information is one-time information input or selected by a user of the first user terminal to allow the user to identify that the call made by the call requester is a call related to approval requested by the user from the caller information indication displayed when the call made by the call requester is received in the second user terminal.