Abstract: There are provided a screensaver displaying method and an information processing system in which characters arbitrarily selected or input by a user can be displayed with a simple operation during starting of a screensaver in the screensaver started at a time when an IC card or the like is pulled out. In the screensaver displaying method and the information processing system in which a computer is usable, while a user authentication device such as the IC card is set in a card reader and writer, and a screensaver screen is displayed and input into the computer cannot be performed, when the IC card or the like is pulled out and the user authentication device is not recognized, a control section of a processing device displays character contents set corresponding to a specific key in the screensaver screen of a display unit, when the specific key is pressed within a specific time after the IC card is pulled out.

Abstract: The present invention provides a data updating method and a data updating system, which can update data of an IC card through a network without mistaking the IC card targeted for updating. When each of issuer client authentication, personal authentication, issuer server authentication and device authentication is performed, a server transmits update data encrypted by a public key used for the device authentication to a client. Then, the client outputs the encrypted update data to an IC card. In the IC card, the update data is decrypted by a secret key used for the device authentication. Based on the decrypted update data, rewriting is carried out in the IC card.

Abstract: The present invention is to provide a memory rental service system in an intelligent authentication unit, the system allowing an application operating entity to set up or change any application freely and easily at a reduced cost of operating the application. In other words, the system is to separately lease one or more specific areas of a memory in the intelligent authentication unit (IAU) for independently authenticating personal identification such as fingerprints, to one or more operators who operate specific applications. A write API distributed to the operator is used to write the contents such as data or a program written in a specific area, while a read/write API is used to authenticate personal identification so as to read the written contents such as the data or program stored in the specific area and operate the application specified by the APL.

Abstract: The present invention is to provide a memory rental service system in an intelligent authentication unit, the system allowing an application operating entity to setup or change any application freely and easily at a reduced cost of operating the application. In other words, the system is to separately lease one or more specific areas of a memory in the intelligent authentication unit (IAU) for independently authenticating personal identification such as fingerprints, to one or more operators who operate specific applications. A write API distributed to the operator is used to write the contents such as data or a program written in a specific area, while a read/write API is used to authenticate personal identification so as to read the written contents such as the data or program stored in the specific area and operate the application specified by the APL.