Abstract: A bank account opening method capable of opening a bank account easily, safely and reliably only by a user and financial institution is provided. In the method for opening an account to a financial institution, an identification document is converted into digital data and the digital data of the identification document is sent to a server of the financial institution via a web content for opening an account, provided from the server of the financial institution, or via e-mail.

Abstract: An individual identifying/attribute authenticating system includes a portable terminal possessed by a buyer of a good or service and an authenticating terminal set at a seller of the good or service. The portable terminal includes at least a component that generates an electronic signature by using a signature key and a component that transmits an electronic certificate and the electronic signature to the authenticating terminal. The authenticating terminal includes at least a component that judges whether or not the electronic signature is legitimate, a component that acquires an attribute information listed in the electronic certificate, in a case in which the electronic signature is legitimate, and a component that judges whether or not the attribute information satisfies a sales restricting condition of the good or service.