Transaction system, transaction method, and information recording medium

A servicing method executed by a server, the method comprising:

• being available to receive, from a second terminal when an application is started on the second terminal, a notification that:
• the application is running on the second terminal, and
• the application is ready to receive a notice from the server;
• receiving a login request specifying a login password from a first terminal assigned to a same user name as the second terminal, the login password being input by a user in the first terminal;
• authenticating the user successfully when:
• the server has received the notification from the application, and
• the login password specified in the login request is correct for the same user name, and
• failing to authenticate the user when:
• the server has not received the notification from the application, or the login password specified in the login request is not correct for the same user name;
• receiving a transaction request from the authenticated user through the first terminal;
• generating a notice specifying details of the received transaction request;
• transmitting the generated notice to the second terminal through the application running on the second terminal to display the specified details in a second screen of the second terminal;
• accepting an answer from the authenticated user through the first terminal;
• and
• determining whether the transaction request is confirmed by the authenticated user or not, based on whether the accepted answer is based on the displayed details or not.

A non-transitory information recording medium storing a program to cause a server computer to:

• be available to receive, from a second terminal when an application is started on the second terminal, a notification that:
• the application is running on the second terminal, and
• the application is ready to receive a notice from the server;
• receive a login request specifying a login password from a first terminal assigned to a same user name as the second terminal, the login password being input by a user in the first terminal;
• authenticate the user successfully when:
• the server has received the notification from the application, and
• the login password specified in the login request is correct for the same user name, and
• fail to authenticate the user when:
• the server has not received the notification from the application, or the login password specified in the login request is not correct for the same user name;
• receive a transaction request from the authenticated user through the first terminal;
• generate a notice specifying details of the received transaction request;
• transmit the generated notice to the second terminal through the application running in on the second terminal to display the specified details in a second screen of the second terminal;
• accept an answer from the authenticated user through the first terminal;
• and
• determine whether the transaction request is confirmed by the authenticated user or not, based on whether the accepted answer is based on the displayed details or not.