Patent ID: 8191118

Claim:
A preliminary verification system under an Internet environment using a phone authentication service, comprising: a first terminal connected to the Internet; a web server for interfacing the first terminal to be accessible for a site which needs a transaction access for authentication; an authentication server for performing the authentication for an electronic transaction requested from the first terminal via the web server; a host server connected to the authentication server for processing the electronic transaction requested from the first terminal; and a call server implemented by a computer and telephony integration (CTI) and an advanced record system (ARS) which are called through telephone network for accessing to a second terminal of a user of the first terminal which the electronic transaction is requested, receiving approval of the electronic transaction, receiving and verifying an authentication number according to the approval of the electronic transaction, and performing a phone authentication which provides authentication completion information according to the verification to the host server, wherein the host server performs the electronic transaction process according to the authentication completion information provided from the call server.