Abstract: Provided is a portable terminal (100) which can perform pseudo push distribution and display of a message obtained in response to a request from a reader/writer from a noncontact IC card by noncontact communication which is difficult to be always connected with. A noncontact IC card, a reader/writer and information distribution method are also provided. The noncontact IC card for receiving a message transmitted from the reader/writer by noncontact communication is mounted on the portable terminal (100). The message transmitted from the reader/writer is provided with an event header wherein setting conditions for specifying a message to be displayed by the portable terminal (100) are indicated.

Abstract: In a portable terminal 10 incorporating a non-contact IC 20, the non-contact IC 20 includes a card appli storage region 24 in which a card appli is stored, and the portable terminal 10 includes an appli storage region 15 in which appli's inclusive of the card appli are stored. When the non-contact IC 20 executes non-contact communication with an external R/W 30 to store the card appli selected by the external R/W 30 in the card appli storage region, a storage region for the card appli is ensured in such a manner that the card appli already stored in the appli storage region 24 is saved into the appli storage region 15. The saving of the card appli stored in the card appli storage region 24 of the non-contact IC 20 is executed using a trilateral communicating function.

Abstract: An information-communication terminal device maintaining a low cost of a charger in the case of backup for the device at a charging time, having a high performance security at the backup and allowing users to easily handle the security control after the backup. A charger (107) in the information communication terminal device is charged electric power from a charger (3). An access-release demanding section (105) receives ID data from the charger (3) during the charging time, and demands to release access control to an IC-card-function installed memory card (2). After the IC card-function installed memory card (2) releases the access control, a control section (101) carries out the backup or restore to the IC card-function installed memory card (2).

Abstract: A mobile terminal system is provided whereby, when a memory card or memory card with an IC function inserted in a mobile terminal apparatus is removed, a function of at least one of the apparatus itself and/or the memory card is locked easily by means of an intuitive operation by the user. This mobile terminal system (100) has a memory card (300) and a mobile terminal (200) in which the memory card (300) is inserted in a removable fashion. The mobile terminal (200) detects lengthy depression of a pressure section (202) pressed by the user by means of a long-depression detection section (204), and detects insertion of the memory card (300) inserted into a slot section (206) in a removable fashion by means of a card insertion/removal detection section (208). A locking execution section (218) locks or unlocks a function of at least one of the terminal (200) itself and/or the memory card (300).

Abstract: In a set-up phase, the base station formulates the secret key S and holds it in secret. The secret information Si which are obtained by dividing the secret key S are distributed in secret to respective terminals 1 to 5 by using cryptographic communication means. In a preparatory phase, the base station 0 broadcasts the preparatory information C1(=gk modp), the exclusive information C2(=y5k modp), the ciphertext C3(=M×K modp), and the particular terminal number 5 to all terminals. In a key sharing phase, the terminal 1 calculates a product of C1{circumflex over ( )}(&lgr;(1, &Lgr;) modq) modp and C2{circumflex over ( )}(&lgr;(5, &Lgr;) modq) modp by using the preparatory information C1 and the exclusive information C2 to obtain K and then calculates M, which are common data to the base station 0, by dividing the ciphertext C3 by K. The terminals 2 to 4 execute similar calculations. As a result, the terminals 1 to 4 can share mutually the common data M.