| 摘要 |
<p>PROBLEM TO BE SOLVED: To effectively prevent information from being used in unauthorized manner by a third person, in a service that handles the information, having the possibility of the third person other than a rightful user using the information in unauthorized manner. SOLUTION: A purchase acceptance server PS, for accepting a purchase request for an electronic ticket, distributes a first AP(application program), constituting an AP corresponding to the electronic ticket to a mobile device MS. In the case of displaying the electronic ticket, a control part of the mobile device MS urges the user to input a password in accordance with the first AP and transmits the password inputted by the user to the purchase acceptance server PS. Meanwhile, the purchase acceptance server PS authenticates the user, on the basis of the received password, performs a second AP making a pair with the first AP of the mobile device MS only in the case of succeeding in the user authentication, generates an object and transmits the object. When control a part of the mobile device MS receives the object, the control part displays an image(i.e., image corresponding to electronic ticket) which corresponds to the object according to the first AP.</p> |
