Abstract: Realizing a data communication device and a data communication method enabling to specify an IC memory mounted in the communication device and to perform data communication to the communication device in which the IC memory is mounted. A mobile device 100 of transmitting side accepts a domain ID specifying a detachable IC memory uniquely from an application 102, a communication driver 105 obtains an IP address of the device of correspondent on the basis of the accepted domain ID from a name server 300 storing the domain ID and the IP address being associated with each other. Then, the communication driver 105 obtains a port ID which an IC memory of the device of correspondent assigned to an application, and transmits the domain ID and the port ID together with a transmission data to the IP address. The device of correspondent rims the application based on the received port ID and executes an appropriate processing.

Abstract: When an application issues an access request to a device via a driver, the application can immediately perform other processing. An IC memory 12 for performing predetermined processing such as encryption processing and decryption processing, an application for performing processing using the IC memory 12, an IC memory handler 14 for performing access processing to the IC memory 12, and a driver 12 that invokes the IC memory handler 14 according to an instruction from the application and returns a response to the effect that the instruction has been accepted to the application, are provided.

Abstract: Realizing a data communication device and a data communication method enabling to specify an IC memory mounted in the communication device and to perform data communication to the communication device in which the IC memory is mounted. A mobile device 100 of transmitting side accepts a domain ID specifying a detachable IC memory uniquely from an application 102, a communication driver 105 obtains an IP address of the device of correspondent on the basis of the accepted domain ID from a name server 300 storing the domain ID and the IP address being associated with each other. Then, the communication driver 105 obtains a port ID which an IC memory of the device of correspondent assigned to an application, and transmits the domain ID and the port ID together with a transmission data to the IP address. The device of correspondent rims the application based on the received port ID and executes an appropriate processing.

Abstract: Between an IC card (1) and a electronic ticket server (2), upon purchasing an electronic ticket a public key cryptosystem is employed for a mutual authentication to keep a strict security, and a shared secret between the electronic ticket and a ticket collecting machine is sent on a secure channel as well as the electronic ticket. Upon usage of the electronic ticket, the IC card (1) and the ticket collecting machine (6) mutually judge whether they carry out the mutual authentication by using a public key cryptosystem or a symmetric key cryptosystem. When they determine to use the symmetric key cryptosystem, they carry out the mutual authentication by using the shared secret exchanged beforehand. When they determine to use the public key cryptosystem, they carry out the mutual authentication by using the same method as that used upon purchasing the electronic ticket.

Abstract: A portable terminal according to the present invention is provided with an electronic book coupon storage, a book data receiver, an electronic book coupon deductor, and a book data decryptor. The electronic book coupon storage stores an electronic book coupon used in acquisition of book data containing a plurality of page data units, along with a decryption key used in decryption of the plurality of page data units. The book data receiver receives the book data from an electronic book providing server. The electronic book coupon deductor deducts an electronic worth equivalent to a price according to page data requested to be read out, from the electronic book coupon. The book data decryptor decrypts the page data in steps of one page data unit by use of the decryption key in conjunction with the deduction of the electronic worth.

Abstract: An IC card (10) is provided with a file creator (16) for creating a voucher file (hereinafter referred to as “file”); an access control list setter (17) for setting an access authority to a created file; an authenticator (14) for performing mutual authentication with an authority recipient (authority recipient to which the whole or part of the access authority to the file has been transferred) and for examining authority transfer certificate data presented by the authority recipient; and an operation controller (15) for usually controlling an operation on the file on the basis of the set access authority and for, when the result of the examination of the authority transfer certificate data is normal, controlling the operation on the file by the authority recipient, based on the transfer content of the access authority indicated in the authority transfer certificate data, instead of the set access authority.

Abstract: A server apparatus including: an electronic value receiving unit for receiving the electronic value from a communication terminal; an electronic worth charging unit for charging the electronic value received by the electronic value receiving unit, with an electronic worth; and an electronic value transmitting unit for transmitting the electronic value charged with the electronic worth by the electronic worth charging unit, to the communication terminal.

Abstract: One IC chip capable of performing both the contact and contactless functions is disclosed. A card and mobile terminal device is disclosed for enabling the IC chip to function as a contact or contactless IC card. The IC chip comprises a CPU; a contact interface connected to the CPU, for enabling data communications with the outside; and a contactless interface connected the CPU for enabling data communications with the outside. The card connectable to the contactless interface of the IC chip includes an antenna, and the antenna being connectable to the contactless interface of the IC chip to enable the IC chip to radio-communicate with the outside. The mobile terminal device connectable to the contact interface of the IC chip includes another CPU, which is connectable to and in communication with the contact interface of the IC chip to make the IC chip function as a contact IC chip.

Abstract: An electronic value transferring device such as a high speed and large capacity computer or mobile terminal device is disclosed that can function as a contactless IC card performing electronic value operations. The device is connectable to an IC card that performs electronic value operations, and includes a microprocessor for transmitting and receiving data to and from the IC card; an interface circuit for providing an IC card interface to allow the IC card to send and receive electronic values to and from other IC cards by radio; an antenna; and the microprocessor having a memory for temporarily storing plural electronic values.

Abstract: The present invention avoids duplication and loss of digital contents by a transmitter/receiver and a malicious third party when the digital contents are transmitted on a communication platform where direct communication is performed between IC cards. A data communications method relating to the present invention includes the steps of executing a predetermined command when an IC card 1a receives a predetermined trigger signal; storing a state of the IC card 1a before transmission of first digital contents; performing an encryption process on the first digital contents based on key information associated with the first digital contents; deleting the first digital contents from a holder 18 of the IC card 1a when a commit instruction indicating completion of a reception process on the encrypted first digital contents is received from a destination device 1b: and performing a return process to the state of the IC card 1a when a transmission process on the first digital contents is interrupted.

Abstract: A portable terminal 20 according to the present invention is provided with an electronic book coupon storage 22, a book data receiver 24, an electronic book coupon deductor 25, and a book data decryptor 26. The electronic book coupon storage 22 stores an electronic book coupon used in acquisition of book data containing a plurality of page data units, along with a decryption key used in decryption of the plurality of page data units. The book data receiver 24 receives the book data from an electronic book providing server 30. The electronic book coupon deductor 25 deducts an electronic worth equivalent to a price according to page data requested to be readout, from the electronic book coupon. The book data decryptor 26 decrypts the page data in steps of one page data unit by use of the decryption key in conjunction with the deduction of the electronic worth.

Abstract: Between an IC card (1) and a electronic ticket server (2), upon purchasing an electronic ticket a public key cryptosystem is employed for a mutual authentication to keep a strict security, and a shared secret between the electronic ticket and a ticket collecting machine is sent on a secure channel as well as the electronic ticket. Upon usage of the electronic ticket, the IC card (1) and the ticket collecting machine (6) mutually judge whether they carry out the mutual authentication by using a public key cryptosystem or a symmetric key cryptosystem. When they determine to use the symmetric key cryptosystem, they carry out the mutual authentication by using the shared secret exchanged beforehand. When they determine to use the public key cryptosystem, they carry out the mutual authentication by using the same method as that used upon purchasing the electronic ticket.

Abstract: The object of the present invention is to prevent the fraudulent copying and creation of digital contents.

Abstract: A cryptographic communication method between IC cards in an electronic ticket distribution system is provided, wherein when a server and a user terminal, to each of which an IC card is connected, begin mutual data-communication or when an IC card and, a ticket collecting machine begin mutual data-communication, they both dynamically change encryption algorithms for mutual authentication and for concealment of contents to be transmitted in accordance with information about commonly usable encryption algorithms exchanged at the beginning of a mutual authentication between them, and this procedure at the beginning of the mutual authentication can result in a speedy and secured cryptographic communication between them.

Abstract: The object of the present invention is to prevent copying of electronic value data itself. In communication system of the present invention, different from the conventional system, source IC card A and target IC card B mutually authenticate the other party, and thereafter the electronic value data is transferred from IC card A to IC card B through direct encryption communication between these IC cards A, B, whereby it is feasible to prevent decipher and falsification of the data by a third party in the middle of a communication path and prevent copying of the data.