METHOD, DEVICE AND RECORDING MEDIUM FOR ELECTRONICALLY MEDIATING SELLING/BUYING OF ARTICLE

摘要

PROBLEM TO BE SOLVED: To mediate selling/buying of an article by using an information terminal or the like while keeping security. SOLUTION: A mediator system 1 issues authentication information specific to a user system 2 in real time. The user system 2 buys the article by transmitting the authentication information to a seller system 3. The seller system 3 transmits the authentication information and charging information to the mediator system 1. The mediator system 1 transmits the charging information to the user system 2. The user system 2 transmits approval information approving charging contents to the mediator system 1. The mediator system 1 transmits approval information approving the payment of a charged amount to the seller system 3.