Dai Nippon Printing Co., Ltd.

Kazuyoshi Irisawa

Jun Takahashi

Seiichi Nishikawa

Yoshikazu Fukushima

Hiroshi Harima

Masaki Wakamatsu

Akiko Moriyama

Mayumi Inada

Naoto Shibata

Tetsuo Shinriki

When in order to enable the use of a plurality of applications (APto AP) simultaneously, preparation commands, having identifiers attached, are provided according to the respective applications and working areas for the respective applications are secured inside a RAM (). By providing a verification command having a specific identifier, a verification process concerning a specific application is performed and a verification result is stored in the corresponding application working area. This verification result is used until the completion of a communication session. To make a specific application execute a desired process, a process executing command that designates an identifier attached to the corresponding application is provided. Adequate security can be ensured and yet a series of linked processes can be performed smoothly while switching among a plurality of application programs in the same communication session.

Portable information recording medium

The invention provides a program-downloading system comprising a USIM () from and in which data can be read and written via a cellular phone terminal () and which holds a given program specification and encryption communication means, and a program server for communicating with the USIM via the cellular phone terminal and providing a program to the universal subscriber identify module according to the given program specification. The program server prepares a program list that can be provided according to a program specification sent out of the USIM via the cellular phone terminal and transmits the program list to the cellular phone terminal, so that when program information selected by the USIM from the program list is received via the cellular phone terminal, a given encryption communication means is selected out of an encryption communication means list transmitted out of the USIM to encrypt a program, which is then downloaded to the USIM.

System for downloading program to general-purpose subscriber identification module

Switching between a requiring mode and a non-requiring mode of password code checking is enabled by an IC card with a CPU for accessing an EEPROM. The general data in the EEPROM are stored upon attachment of error check codes. The memory area of EEPROM is partitioned into unit areas of 2-byte length and writing is performed according to unit areas. The MSB of a specific unit area Ux is used as a checking requirement flag with '1' being defined as checking 'required' and &#x201c;0&#x201d; being defined as checking &#x201c;not required&#x201d;. In rewriting the checking requirement flag, an erasure process sets all bits in the unit area Ux to &#x201c;1&#x201d; and thereafter the desired flag is set in the MSB.

Portable information processor having password code checking function

Authentification data (R) comprising random numbers generated by a reader/writer () is given to an IC card (), encrypted by utilizing a secret key (a), and returned as encryption data (C). This encryption data (C) is decoded by utilizing an open key (&#x3b2;) to authentify the IC card. A set of past given authentification data (R) is stored in an authentification data storage section (): if another set of given authentification data (R) is the same as the set of past data, an encryption operating section () is prevented from executing an illegal statistical analysis technique by repeatedly giving encrypting operation the same set of authentiification data (R).

Portable information storage medium and its authentication method

A sheet-framed IC carrier has a sheet frame having an aperature, and a backing film with a pressure-sensitive adhesive layer on one surface thereof which is adhered to the back surface of the sheet frame. An IC carrier having an IC module is secured in the aperature of the sheet frame with the adhesive layer on the backing film. When the IC carrier is removed from the sheet-framed IC carrier, no excessive load is exerted on the IC module and no projection remains on the peripheral edge of the carrier base.

Sheet-framed IC carrier, method for producing the same, and IC carrier case

A sheet-framed IC carrier has a sheet frame having an aperture, and a backing film with a pressure-sensitive adhesive layer on one surface thereof which is adhered to the back surface of the sheet frame. An IC carrier having an IC module is secured in the aperture of the sheet frame with the adhesive layer on the backing film. When the IC carrier is removed from the sheet-framed IC carrier, no excessive load is exerted on the IC module and no projection remains on the peripheral edge of the carrier base.

Growing community of inventors

Tokyo, Japan

Kazuyoshi Irisawa