Abstract: An access violation of the program is monitored by the access monitor which is a hardware. The access monitor acquires a signal input from the CPU to a memory. The access monitor includes an access permission table as information of the memory region to be permitted to each program, and detects the access violation of the signal from the CPU by referring thereto. In this manner, the unjust access is monitored by the hardware, thereby preventing the unjust access by rewriting in software.

Abstract: The installation method makes possible the installation of new programs, while maintaining security, in a system LSI device. The installation method comprises a step for receiving the signature data 7 of a program 6, a step for checking for interference with other already installed programs on the basis of said signature data 7, and a step for authorizing the installation of programs with which there is no interference. A declaration of signature data is elicited from a program being installed; a check for interference among programs is performed based on this, authentication is performed, and the installation of interfering programs is prevented or the installation of programs with which there is no interference is executed. It therefore becomes possible to install new programs while protecting high-security programs.

Abstract: An IC card of the present invention, which receives a power supply or a radio wave from an upper apparatus so as to operate an internal IC chip, has, for example, an FeRAM which can be used as a program memory and a work memory. When a power supply is broken during a writing process so as not to be supplied to the inside, a ferroelectric capacitor in the FeRAM 4 is used so that a voltage for time required for completing the writing process is secured.

Abstract: The IC card sets a status bit, to which an update command including write data is allotted, at a processing start state if receiving the update command from a host apparatus, updates a data region based on control information including information on a previous control region, sets the status bit at a processing end state, and finally transmits a response message to the host apparatus. When restarted if an update processing was interrupted, the IC card prohibits a write data update processing and transmits an error signal to the host apparatus if the status bit is set at the processing start state, and completes the update processing and then transmits the response message to the host apparatus if the status bit is set at the processing end state.

Abstract: There is provided an electronic transaction apparatus (e.g., an electronic money terminal) for processing a transaction engaged in by parties facing each other during which one party (a customer) confirms transaction information entered by the other party (a waiter), the direction in which the transaction information is displayed on a display unit of the apparatus is automatically reversed. As a result, the screen display can be directed towards the party (the customer) who must confirm transaction information without the electronic transaction apparatus being physically reversed.

Abstract: The IC card sets a status bit, to which an update command including write data is allotted, at a processing start state if receiving the update command from a host apparatus, updates a data region based on control information including information on a previous control region, sets the status bit at a processing end state, and finally transmits a response message to the host apparatus. When restarted if an update processing was interrupted, the IC card prohibits a write data update processing and transmits an error signal to the host apparatus if the status bit is set at the processing start state, and completes the update processing and then transmits the response message to the host apparatus if the status bit is set at the processing end state.

Abstract: The installation method makes possible the installation of new programs, while maintaining security, in a system LSI device. The installation method comprises a step for receiving the signature data 7 of a program 6, a step for checking for interference with other already installed programs on the basis of said signature data 7, and a step for authorizing the installation of programs with which there is no interference. A declaration of signature data is elicited from a program being installed; a check for interference among programs is performed based on this, authentication is performed, and the installation of interfering programs is prevented or the installation of programs with which there is no interference is executed. It therefore becomes possible to install new programs while protecting high-security programs.

Abstract: A coordinate input device includes coordinate detecting elements for detecting input coordinates, operating elements for generating operational information corresponding to a predetermined operation and a communication element for transmitting data of said input coordinates detected by said coordinate detecting elements and said operational information generated by an operation of said operating elements to a processing device. The coordinate input device further comprises an IC card access element for allowing an access to an IC card.

Abstract: An IC card of the present invention, which receives a power supply or a radio wave from an upper apparatus so as to operate an internal IC chip, has, for example, an FeRAM which can be used as a program memory and a work memory. When a power supply is broken during a writing process so as not to be supplied to the inside, a ferroelectric capacitor in the FeRAM 4 is used so that a voltage for time required for completing the writing process is secured.

Abstract: An access violation of the program is monitored by the access monitor which is a hardware. The access monitor acquires a signal input from the CPU to a memory. The access monitor includes an access permission table as information of the memory region to be permitted to each program, and detects the access violation of the signal from the CPU by referring thereto. In this manner, the unjust access is monitored by the hardware, thereby preventing the unjust access by rewriting in software.

Abstract: The present invention discloses an electronic money managing and possessing apparatus used for managing and possessing electronic money, which includes a medium for holding an electronic money defined as an electronic symbol of currency in a required storage so as to be rewritten when currency of a single kind is used, and electronic money distribution and storage control unit for setting a plurality of storage areas defined according to individual purposes in the storage of the medium and distributing and storing the electronic money in the plurality of storage areas according to purposes as instructed and electronic money payment executing unit for specifying, regarding the electronic money possessed in the medium, a desired storage area and executing payment with the electronic money stored in this specified storage area. Even if currency of only a single kind is used, electronic money can be classified and managed according to various purposes.

Abstract: An electronic transaction apparatus (e.g., an electronic money terminal) for processing a transaction engaged in by parties facing each other during which one party (a customer) confirms transaction information entered by the other party (a waiter), the direction in which the transaction information is displayed on a display unit of the apparatus is automatically reversed. As a result, the screen display can be directed towards the party (the customer) who must confirm transaction information without the electronic transaction apparatus being physically reversed.

Abstract: A terminal device and a terminal system which are adapted for electronic money, excellent in operability and easy in the management of the electronic money. The terminal device used in combination with a host server has a function receiving a predetermined amount of electronic money from the host server when running start is instructed, a function of receiving the electronic money of the amount of payment from an IC card of a customer when a goods is bought, a function of transferring the electronic money to the host server so that when the internal balance of the electronic money exceeds an upper limit value of the balance, the balance of electronic money reaches a lower limit value of the balance, a function of transferring all the internal amount of electronic money to the host server, and other functions.