Abstract: An encrypted ID takes as its initial value a tag ID that constitutes an original ID of a wireless tag, and is encrypted using an encryption key each time an ID inquiry is received from a reader/writer. Another encrypted ID also takes the tag ID as its initial value, and is encrypted using an encryption key each time an ID inquiry is received. The wireless tag gives confidential variability to the ID by transmitting a combination of the encrypted ID and the another encrypted ID in reply. The reader/writer can obtain the original ID merely by decoding the two encrypted values until they match, and the decoding load does not increase even if the number of wireless tags that are reading targets increases.

Abstract: A processing apparatus including an internal circuit having a CPU and internal devices and an external circuit including external devices provided externally of the internal circuit, and the like, and is aimed to prevent illicit access and reverse engineering. The internal circuit including a CPU, internal devices and a bus line connecting the CPU to the internal devices and extending externally, and the external circuit including external devices provided externally of an externally extending portion of the bus line. The internal circuit further including a ciphering section 120 provided at an entrance to an external side and ciphering addresses and data on the bus line by ciphering patterns according to a plurality of regions divided from an address space allotted to the entire external devices.

Abstract: An encrypted ID takes as its initial value a tag ID that constitutes an original ID of a wireless tag, and is encrypted using an encryption key each time an ID inquiry is received from a reader/writer. Another encrypted ID also takes the tag ID as its initial value, and is encrypted using an encryption key each time an ID inquiry is received. The wireless tag gives confidential variability to the ID by transmitting a combination of the encrypted ID and the another encrypted ID in reply. The reader/writer can obtain the original ID merely by decoding the two encrypted values until they match, and the decoding load does not increase even if the number of wireless tags that are reading targets increases.

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: A non-contact IC recording medium that operates in response to a radio instruction from a reader/writer includes a write-protect area setting unit that sets a write-protect area where a writing of data is prohibited; an area determining unit that determines, when data for the writing is received, whether an area where the data is to be written is the write-protect area; and a write processing unit that writes, when the area determining unit determines that the area is not the write-protect area, writes the data in the area, and changes the area into the write-protect area.

Abstract: A protocol control integrated circuit configured by integrating, on one chip, hardware and control programs necessary for conducting data interchange through communications with portable type mediums, and used in common among various types of apparatus. Thus, the integrated circuit is constructed by integrating, on one chip, a storage section for storing a control program prepared for protocols for a plurality of digital money different in mode from each other, a processing section for controlling the handling of the plurality of digital money, different in mode, by running the control program stored in the storage section, and an interface circuit connected to an external circuit including at least one of an external processing section and an external storage section for fulfilling an interface function between the external circuit and the processing section. Further this invention is applicable to various types of transaction apparatus capable of handling, for example, digital money and credit transactions.

Abstract: The present invention relates to a device connection state recognizing method capable of recognizing a connection state of devices without addition of signal lines dedicated to detection. Thus, in the method according to this invention, a portion of or all of a plurality of data signal lines are connected through pull-up resistors to a high electric potential or connected through pull-down resistors to a low electric potential in accordance with the connection state of the devices, and a processing unit reads, as structure information data, a high electric potential state/low electric potential state generated by the pull-up resistor/pull-down resistor in the portion of or all the plurality of data signal lines to recognize the connection state of the devices on the basis of the read structure information data. This invention is applicable to a various types of processing units which are to be connected through a common data bus to a plurality of devices.

Abstract: In a settlement system comprising an IC card terminal (a transaction medium terminal), a settlement terminal and a settlement server, IC card based settlement processing that the IC card terminal has so far executed, is distributed to the settlement terminal and the settlement server as well. The distribution would reduce load of processing by the IC card terminal, and because of the reduced load, the IC card terminal would not anymore require a CPU with a high processing capability or a large capacity of memory, contributing to low-costing of the IC card terminal, and eventually, allowing the total settlement system to embody low-costing.

Abstract: The present invention relates to a method and system capable of gaining access (data transfer) to portable type mediums whose number is larger than the number of ports on a processing unit side. Thus, in this invention, by using a demultiplexer, to one or more portable type medium ports provided in a processing unit there are connected a plurality of portable type mediums whose number is larger than the number of the ports. The demultiplexer selectively switches the ports and, of the plurality of portable type mediums, the mediums to be accessed by the processing unit for establishing the connections therebetween. This invention is applicable to data transfer between a plurality of portable type mediums such as IC cards capable of storing digital money and a processing unit having an ability to gain access to these portable type mediums.

Abstract: An electronic apparatus is provided that can prevent wrongful reverse analysis by a third party. Authorization functions are provided in the electronic apparatus for judging whether or not to enable utilization of debugging functions. The authorization functions send command data to an external device connected to the electronic apparatus, based on a debug request containing the designation of a prescribed address range in the internal circuitry of the electronic apparatus, a first authorization is performed, based on the command data and on reply data to the command data received from the external device, a second authorization is performed, based on a user code received from the external device following the reply data, and use of the debugging functions is enabled, based on the first authorization and the second authorization.

Abstract: A command from an upper device is transferred from a communicating section via three bus interfaces to three command control sections and a result of the command processing is transferred therethrough from each of the command control sections to the communicating section and, a diagnosis command is transferred from the communicating section via three diagnosis check paths to the command control sections and a result of the diagnosis is transferred therethrough from each of the command control section to the communicating section. A command received from the upper device is transferred to a command control section or command control sections confirmed as normal as a result of diagnosis for execution of the command processing.

Abstract: As an alarm reception flag offers an “ON” state indicating that a sign of an occurrence of abnormality on a digital cash module associated with the alarm reception flag is detected, a control unit of a digital cash safe performs on a priority basis a processing for transfer of digital cash data to an IC card, which is the primary service of the digital cash safe, and simultaneously performs a save processing for digital cash data stored in the digital cash module on which a sign of abnormality is detected.

Abstract: The present invention relates to a processing apparatus comprised with an internal circuit having a CPU and internal devices and an external circuit including external devices provided externally of the internal circuit, and the like, and is aimed to prevent illicit access and reverse engineering.

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: There is provided a data communication device for transmitting input data to a host device, comprising: a sampling unit for sampling the input signal corresponding to the input operation at every prescribed timing cycle; a transmitter for transmitting data corresponding to the level of the sampled input signal to a host device; and a dummy signal generator for generating a dummy signal and laying the dummy signal over the input signal during the time period other than the sampling period. Even in the case of wiretapping of the input signal, the dummy signal that is unrelated to the input operation will thereby be detected along with the input signal. Theft of the data corresponding to the input signal can be prevented because the wiretapper will be unable to distinguish which is the input signal.

Abstract: A method of communication between an adapter and a drive improves the data processing efficiency of the adapter and data transfer efficiency between the adapter and the drive. The drive has a slot to receive a disk cartridge containing a disk and drives the cartridge. The adapter is shaped to be inserted into the slot of the drive. The adapter has a controller to transfer data between the adapter and the drive through the heads thereof. The controller formats data so that the formatted data may fit into at least part of a disk format having tracks and sectors handled by the drive. The controller assigns a specific one of the tracks to the formatted data and transmits the track with the data to the drive.

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: In a non-volatile memory are arranged a plurality of IC card storage units corresponding to a plurality of IC cards each storing therein an electronic money representing the value of currency in the form of electronic information. A command control unit executes concurrently commands imparted to the plurality of IC card storage units arranged in the non-volatile memory to logically implement a control function of the plurality of IC cards. In addition, upon a receipt of a single or a plurality of commands from a host apparatus (a money server), a communication control unit forms concurrently communication paths corresponding in numbers to the commands and associated with the command control unit to logically implement a function of communication with the plurality of IC card storage units.

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.

Abstract: A method of communication between an adapter and a drive improves the data processing efficiency of the adapter and data transfer efficiency between the adapter and the drive.The drive has a slot to receive a disk cartridge containing a disk and drives the cartridge. The adapter is shaped to be inserted into the slot of the drive. The adapter has a controller to transfer data between the adapter and the drive through the heads thereof. The controller formats data so that the formatted data may fit into at least part of a disk format having tracks and sectors handled by the drive. The controller assigns a specific one of the tracks to the formatted data and transmits the track with the data to the drive.