JP2023039526A - Contactless communication device, contactless chip, and upper layer message processing method - Google Patents

Abstract

Kind Code: A1 A contactless communication device is provided that determines an application to which an upper layer message stored in a device selection command used in anticollision processing is delivered, based on the current application.
A non-contact communication device 1 receives a memory 21 storing application information indicating an application to be made current implicitly, and upon receiving a device selection command storing an upper layer message in anticollision processing, the contactless communication device 1 stores the application information. An anti-collision means 10 is provided for retrieving from the memory 21 and passing the upper layer message to the application indicated by the application information retrieved from the memory 21 for processing.
[Selection drawing] Fig. 7

Description

The present invention relates to a contactless communication device mounted with a contactless chip compatible with contactless communication.

Contactless chips compatible with the NFC standard (NFC: Near field communication) are mounted in various devices such as contactless IC cards and smartphones. Here, a device mounted with a contactless chip is called a contactless communication device.

The NFC standard defines more than one contactless communication standard. Contactless communication standards defined by the NFC standard include ISO/IEC14443_TypeA and ISO/IEC14443_TypeB in addition to ISO/IEC18092 (for example, Felica (registered trademark)).

ISO/IEC14443_TypeB is used in Japan for applications that require high security. For example, in Japan, ISO/IEC14443_TypeB is used for my number cards, passports, driver's licenses, and the like.

FIG. 8 is a diagram for explaining anti-collision processing of ISO/IEC14443_TypeB. In ISO/IEC14443_TypeB, anticollision processing is called initialization and anticollision.

In the ISO/IEC14443_TypeB anti-collision process, the initial state of the contactless communication device is the POWER-OFF state S20. The POWER-OFF state S20 is a state in which power is not supplied to the contactless chip mounted on the contactless communication device. That is, in the POWER-OFF state S20, the contactless communication device is not in the vicinity of the PCD (Proximity Coupling Device) that generates the operating magnetic field.

Power is supplied to the contactless chip when the contactless communication device is placed in the vicinity of the PCD that produces the operating magnetic field. The state of the contactless communication device transitions from the POWER-OFF state S20 to the IDLE state S21. In IDLE state S21, the contactless communication device recognizes a request command (REQB). When the contactless communication device recognizes a request command whose AFI (Application Family Identifier) matches (or a request command whose AFI is “0”) in the IDLE state S21, the state of the contactless communication device changes from the IDLE state S21 to READY. - Transition to the REQUESTED state S22.

The contactless communication device that has recognized the request command sends out a request response (ATQB) as a response to the request command in the READY-REQUESTED state S22. When the request response is sent, the state of the contactless communication device transitions from READY-REQUESTED state S22 to READY-DECLARED state S23.

In the READY-DECLARED state S23, the contactless communication device can at least recognize a device selection command (ATTRIB), which is a command to select the contactless communication device. When the contactless communication device receives a device selection command including a PUPI (Pseudo-Unique PICC Identifier) that matches the PUPI held by the contactless chip, the state of the contactless communication device is activated from the READY-REQUESTED state S23. It transitions to state S24 (ACTIVE state). The activated state S24 is a state in which application commands are accepted.

As described above, in ISO/IEC14443_TypeB, the command for changing the state of the non-contact communication device to the activated state S24 that accepts the application command is the device selection command. In ISO/IEC14443_TypeB, an upper layer message to be passed to the upper layer as optional information can be stored in the device selection command. A response to the device selection command storing the upper layer message to be passed to the upper layer can include the processing result of the upper layer message.

Thus, the device selection command can store an upper layer message to be passed to the upper layer. However, the specific method of using this upper layer message is not defined in ISO/IEC14443_TypeB. For example, in Patent Document 1, file designation information (file identification information) is stored in a device selection command as an upper layer message. Further, in Patent Document 2, at least part of the mutual authentication command is stored in the device selection command as an upper layer message. Furthermore, in Patent Document 3, a TVL structure command is stored in a device selection command as an upper layer message.

Japanese Patent Application Laid-Open No. 2010-238080 JP 2010-225055 A JP 2012-064048 A

The upper-layer message stored in the device selection command becomes the data to be passed to the upper-layer application. not Therefore, in order to pass the upper layer message stored in the device selection command to the application, it is necessary to clarify the application to which this upper layer message is passed.

The contactless communication device applies the security set for the application that becomes current. Therefore, it would be desirable to be able to determine the application to which the upper layer message contained in the device selection command is passed based on the current application.

Therefore, the present invention provides a non-contact communication device that determines an application to which an upper layer message stored in a device selection command used in anticollision processing is passed based on the current application. The present invention also provides a contactless IC chip to be mounted on this contactless communication device. Furthermore, the present invention provides a method of determining, based on the current application, the application to which the upper layer message stored in the device selection command used in anticollision processing is delivered.

A non-contact communication device according to a first aspect of the present invention for solving the above-described problems includes a memory storing application information indicating an implicit current application so that an implicit current application can be grasped. Further, the contactless communication device stores the upper layer message in anti-collision processing so that the application to which the upper layer message stored in the device selection command is passed can be implicitly determined based on the current application. An anti-collision means is provided for, upon receiving a device selection command, retrieving the application information from the memory and delivering an upper layer message to the application indicated by the application information retrieved from the memory for processing.

In the contactless communication device according to the first aspect of the invention, the application that is implicitly made current can be the default application that is implicitly made current when the anti-collision process is completed and the device is activated. In this case, in the contactless communication device according to the first aspect of the invention, the memory stores the application information indicating the default application implicitly made current when the anticollision process is finished and the anticollision process is finished and the anticollision process is activated. Further, when only the application information indicating the default application can be retrieved from the memory, the anti-collision means hands over the upper layer message to the default application for processing.

In the contactless communication device according to the first invention, the implicit current application can be an anti-collision application that is implicitly current in anti-collision processing. In this case, in the non-contact communication device according to the first invention, the memory stores the application information indicating the anti-collision application implicitly current in the anti-collision process. Further, the anti-collision means, regardless of whether or not the application information indicating the default application has been retrieved, if the application information indicating the anti-collision application can be retrieved from the memory, the anti-collision application hand over the upper layer message for processing.

A contactless chip according to the second invention is a contactless chip to be mounted on the contactless communication device according to the first invention. The constituent elements of the contactless communication device according to the first invention can be provided in a contactless chip mounted on the contactless communication device. Therefore, in the present invention, a patent right is also claimed for the contactless chip mounted on the contactless communication device.

A method for processing an upper layer message according to a third aspect of the present invention includes procedure a, procedure b, and procedure c as procedures executed by means for executing anticollision processing in a contactless communication device. In the procedure a, the means receives a device selection command containing an upper layer message in anticollision processing. In step b, the means includes application information indicating the implicitly current application so that the application to which the upper layer message stored in the device selection command is delivered can be determined based on the implicitly current application. is retrieved from the memory, and in the procedure c, the means hands over the upper layer message to the application indicated by the application information retrieved from the memory for processing.

In the upper-layer message processing method according to the third aspect of the present invention, the application that is implicitly made current can be made the default application that is implicitly made current when the anti-collision process ends and the application is activated. In this case, in the procedure b, the means retrieves from the memory only the application information indicating the default application that is implicitly made current when the anti-collision process is completed and activated, and in the procedure c, , to pass the upper layer message to the default application for processing.

In the upper layer message processing method according to the third aspect of the present invention, an application that is implicitly made current can be an anticollision application that is implicitly made current in anticollision processing. In this case, in the procedure b, the means searches the memory for the application information indicating the anti-collision application implicitly current in the anti-collision process, and in the procedure c, the means indicates the default application. The upper layer message is passed to the anti-collision application for processing regardless of whether the application information can be retrieved.

In order to solve the problem of the present invention, in the present invention, application information indicating an application that implicitly becomes current is stored in the memory of a contactless communication device, and an upper layer message included in a device selection command used in anticollision processing is stored. based on application information stored in memory.

The figure explaining a contactless communication device. The figure which showed the hardware block diagram of a non-contact communication device. The figure which showed the hierarchical structure of a contactless communication device. The figure which showed the functional block diagram of a non-contact communication device. The figure which illustrated an example of the file structure of a contactless communication device. FIG. 4 illustrates the information used by the anti-collision means of the contactless communication device; The figure explaining operation|movement of the anti-collision means of a contactless communication device. The figure explaining the anti-collision processing of ISO/IEC14443-TypeB.

Embodiments according to the present invention will now be described. This embodiment is intended to facilitate understanding of the present invention, and the present invention is not limited to this embodiment. In addition, unless otherwise specified, the drawings are schematic diagrams drawn to facilitate understanding of the present invention.

A non-contact communication device 1 according to this embodiment will be described. FIG. 1 is a diagram illustrating a contactless communication device 1 according to this embodiment. The non-contact communication device 1 according to this embodiment is a device compatible with ISO/IEC14443_TypeB. The PCD 6 (Proximity Coupling Device) is a read/write device that supplies power to the contactless communication device 1 by inductive coupling and exchanges data with the contactless communication device 1 . The non-contact communication device 1 incorporates a coil antenna 1a and a non-contact chip 2 connected thereto, and processes commands sent by the PCD 6. FIG.

Although FIG. 1 illustrates the contactless communication device 1 as a contactless IC card, the contactless IC card is only one form of the contactless communication device 1 . The contactless communication device 1 may be a medium on which a coil antenna 1a and a contactless chip 2 connected thereto are mounted. The shape of the contactless communication device 1 can also be stick-like or coin-like. Also, mobile terminals such as smartphones on which the contactless chip 2 is mounted are also included in the form of the contactless communication device 1 .

FIG. 2 shows a hardware configuration diagram of the contactless communication device 1. As shown in FIG. In FIG. 2, only the circuit of the non-contact communication device 1 related to non-contact communication is illustrated. As shown in FIG. 2, the contactless communication device 1 has a coil antenna 1a. A contactless chip 2 is connected to the coil antenna 1a. In order to comply with ISO/IEC14443_TypeB, the coil antenna 1a is tuned to a frequency of 13.56MHz.

The non-contact chip 2 illustrated in FIG. 2 includes a power supply circuit 22, a modulation circuit 24, a demodulation circuit 23, a CPU 20 (Central Processing Unit), and a memory 21. FIG. The power supply circuit 22 is a circuit that generates operating power for the contactless chip 2 from a carrier wave oscillated by the PCD 6 . The modulation circuit 24 is a circuit that carries out processing to put data on the carrier wave that the PCD 6 oscillates. The demodulation circuit 23 is a circuit that performs processing to restore the data carried on the carrier wave that the PCD 6 oscillates. A CPU 20 is a central processing unit of the contactless chip 2 . The memory 21 is an electrically rewritable nonvolatile memory.

As shown in FIG. 2, the power supply circuit 22, demodulation circuit 23 and modulation circuit 24 are each connected to the coil antenna 1a. In addition to the power supply circuit 22 , the demodulation circuit 23 and the modulation circuit 24 , the memory 21 is connected to the CPU 20 . Note that FIG. 2 shows only a part of the circuits provided in the contactless chip 2 . The contactless chip 2 is provided with various circuits necessary for the operation of the contactless chip 2 in addition to the circuits illustrated in FIG. For example, the contactless chip 2 includes a read-only nonvolatile memory and a volatile memory in addition to the electrically rewritable memory 21 .

In FIG. 3, the hierarchical structure 3 of the contactless communication device 1 is illustrated. The hierarchical structure 3 of the contactless communication device 1 includes a physical layer (hardware) 30, a physical layer (radio waves) 31, a data link layer 32, a transport layer 33 and an application layer . A physical layer (hardware) 30 is a layer defined by ISO/IEC14443_Part1. A physical layer (radio waves) 31 is a layer defined by ISO/IEC14443_Part2. The data link layer 32 is a layer defined by ISO/IEC14443_Part3. The data link layer 32 is the layer that performs anticollision processing (initialization and anticollision). The transport layer 33 is a layer defined by ISO/IEC14443_Part4. The transport layer 33 is a layer that executes transmission protocols. The application layer 34 is defined by ISO/IEC7816_Part4 or the like. For example, the application layer 34 is a layer that processes command APDUs (Application Protocol Data Units) defined by ISO/IEC7816_Part4.

In the hierarchical structure 3 of the contactless communication device 1 shown in FIG. 3, a physical layer (hardware) 30 and a physical layer (radio waves) 31 are realized by the coil antenna 1a and the contactless chip 2. FIG. The data link layer 32 , transport layer 33 and application layer 34 are implemented by computer programs implemented on the contactless chip 2 .

FIG. 4 illustrates a functional block diagram of the contactless communication device 1 according to this embodiment. The non-contact communication device 1 according to this embodiment includes anti-collision means 10 as a means for executing processing related to the data link layer 32 . The anti-collision means 10 is implemented by a computer program that operates the CPU 20 of the contactless chip 2 . The anti-collision means 10 according to the present embodiment executes processing related to anti-collision processing defined by ISO/IEC14443-Type B as processing related to the data link layer 32 .

One of the commands used in the anti-collision processing defined by ISO/IEC14443-Type B is a device selection command used when the PCD 6 selects a contactless communication device. The device selection command is called ATTRIB in ISO/IEC14443-TypeB. The device selection command can contain an upper layer message to be processed by the upper layer. In ISO/IEC14443-Type B, an upper layer message is stored in the upper layer field of the device selection command.

In the case of the contactless communication device 1 , the layer to which the upper layer message stored in the device selection command is delivered is the application layer 34 which is the layer above the data link layer 32 . In FIG. 4, the default application 12 and the anticollision application 11 are implemented in the application layer 34 .

Anti-collision processing is processing related to the data link layer 32 . Therefore, the application of the application layer 34 is not selected during execution of anti-collision processing. Therefore, when the layer that delivers the upper layer message stored in the device storage command is the application layer 34, the application that delivers this upper layer message must be clarified.

In view of this, the anti-collision means 10 provided in the non-contact communication device 1 according to the present embodiment is configured to implicitly select an application that delivers the upper layer message stored in the device selection command. ing.

In the case of the contactless communication device 1, one of the applications implicitly selected is an application implicitly selected when the activation state S24 is reached. In this embodiment, an application that is implicitly selected when the anti-collision process is completed and the non-contact communication device 1 is in the activated state S24 is called a default application 12 . By setting the default application 12 as the application that delivers the upper layer message stored in the device selection command, the authentication processing set in the default application 12 can be completed with the anti-collision processing.

In the case of the non-contact communication device 1, one of the implicitly selected applications is an implicitly selected application in the anti-collision process. In this embodiment, an application implicitly selected for anticollision processing is called an anticollision application 11 . By setting the anti-collision application 11 as the application that delivers the upper layer message stored in the device selection command, the authentication processing set in the anti-collision application 11 can be completed with the anti-collision processing.

FIG. 5 shows an example of the file structure 4 of the contactless communication device 1. As shown in FIG. The file structure 4 of the contactless communication device 1 is the structure of files stored in the memory 21 of the contactless communication device 1 . As illustrated in FIG. 5, the file structure 4 of the non-contact communication device 1 includes a main file MF (Master File) that is the basis of the file structure 4 and a dedicated file DF (dedicated file) that stores applications.

In FIG. 5, the file structure 4 of the contactless communication device 1 has a hierarchical structure in which the dedicated file DF is arranged under the main file MF, but the file structure 4 of the contactless communication device 1 is limited to the structure shown in FIG. not. The file structure 4 of the contactless communication device 1 can also have a structure in which the dedicated file DF is arranged independently of the main file MF.

In the file structure 4 illustrated in FIG. 5, the application having the security function for the entire contactless communication device 1 is the main file MF. Therefore, in the file structure 4 shown in FIG. 5, the main file MF becomes the anti-collision application 11 . In this case, the authentication process associated with the main file MF can be performed by the anticollision procedure. Also, in the file structure shown in FIG. 5, one of the dedicated files DF becomes the default application 12 . In this case, the authentication processing set in the dedicated file DF can be performed by the anticollision procedure.

Thus, in the non-contact communication device 1 according to this embodiment, the default application 12 and the anti-collision application 11 are implicitly current applications. Naturally, the default application 12 may be the only application that implicitly becomes current. In some cases, the application that implicitly becomes current is only the anti-collision application 11 .

Anti-collision processing related to the data link layer 32 is performed prior to selection of applications stored in the application layer 34 . Therefore, when both the default application 12 and the anti-collision application 11 are stored in the contactless communication device 1, the anti-collision application 11 is the application that delivers the upper layer message stored in the device selection command.

FIG. 6 illustrates information used by the anti-collision means 10 of the contactless communication device 1 . A memory 21 installed in the non-contact communication device 1 stores application information indicating an implicitly selected application. When the anticollision application 11 is stored in the contactless communication device 1 , the anticollision application information 13 is stored in the memory 21 . Also, when the default application 12 is stored in the contactless communication device 1 , default application information 14 is stored in the memory 21 .

The application information can be data of a TLV structure having a tag indicating the type of application (anti-collision application 11 or default application 12). Data for designating an application, such as the name of a dedicated file corresponding to the application or a file identifier, is stored in the Value of the data of this TLV structure.

FIG. 7 is a diagram for explaining the operation of the anti-collision means 10 of the contactless communication device 1. FIG. The description of FIG. 7 also serves as a description of the method of processing upper layer messages according to the present invention. The anti-collision means 10 provided in the non-contact communication device 1 executes a series of processes related to anti-collision processing specified by ISO14443_TypeB. showing.

The anti-collision means 10 provided in the contactless communication device 1 confirms whether an upper layer message is stored in the device selection command when processing the device selection command received from the PCD 6 in step S1 of FIG.

If no upper layer message is stored in the device selection command, the anti-collision means 10 provided in the contactless communication device 1 proceeds to step S10 in FIG. 7 and transmits a response to the device selection command without the upper layer message processing result. Then, the procedure of FIG. 7 ends.

If an upper layer message is stored in the device selection command, the anti-collision means 10 provided in the contactless communication device 1 proceeds to step S2 in FIG. 7 and searches the memory 21 for application information.

The anti-collision means 10 provided in the contactless communication device 1 confirms whether or not the anti-collision application information 13 has been retrieved in step S3 of FIG. If the anti-collision application information 13 can be retrieved, the anti-collision means 10 provided in the contactless communication device 1 proceeds to step S4 in FIG. handed over for processing. The anticollision application 11 processes the upper layer message handed over from the anticollision means 10 in step S5 of FIG. When the anti-collision application 11 completes the processing related to the upper layer message handed over from the anti-collision means 10, the anti-collision means 10 provided in the contactless communication device 1 proceeds to step S9 in FIG. The device selection command response including the result of processing the upper layer message passed from 11 is transmitted, and the procedure of FIG. 7 ends.

If the application information of the anti-collision application 11 cannot be retrieved in step S3 of FIG. 7, the anti-collision means 10 provided in the contactless communication device 1 checks whether the default application information 14 has been retrieved in step S6 of FIG. .

If the default application information 14 can be retrieved, the anti-collision means 10 provided in the contactless communication device 1 passes the upper layer message stored in the device selection command to the default application 12 in step S7 of FIG. Let The default application 12 processes the upper layer message handed over from the anticollision means 10 in step S8 of FIG. When the default application 12 completes the processing related to the upper layer message, the anti-collision means 10 provided in the contactless communication device 1 proceeds to step S9 in FIG. A response to the selected device selection command is transmitted, and the procedure in FIG. 7 ends.

If the application information 51 of the default application 12 cannot be retrieved in step S3 of FIG. 7, the anti-collision means 10 provided in the contactless communication device 1 proceeds to step S10 of FIG. A response to the command is sent, and the procedure in FIG. 7 ends.

According to the procedure illustrated in FIG. 7, when the application to be implicitly selected is set in the contactless communication device 1, the anti-collision means 10 sends the upper layer message stored in the device selection command to the implicit application. Performs an action to hand over and process.

When at least the anti-collision application 11 is stored in the non-contact communication device 1 as an implicitly selected application, regardless of whether only the default application 12 is stored in the non-contact communication device 1, the application shown in FIG. Procedures S4 and S5 are performed. Then, in step S9 of FIG. 7, a response to the device selection command including the result of processing the upper layer message by the anti-collision application 11 is transmitted.

Further, when the anti-collision application 11 is not stored in the non-contact communication device 1 as an implicitly selected application, and only the default application 12 is stored in the non-contact communication device 1, step S7 in FIG. And step S8 is executed. Then, in step S9 of FIG. 7, a device selection command response including the result of processing the upper layer message by the default application 12 is transmitted.

REFERENCE SIGNS LIST 1 contactless communication device 10 anticollision means 11 anticollision application 12 default application 13 anticollision application information 14 default application information 2 contactless chip 20 CPU
21 memory 3 hierarchical structure 32 data link layer 34 application layer

Claims (7)

A memory storing application information indicating an application to be made current implicitly, and upon receiving a device selection command storing an upper layer message in anti-collision processing, the application information can be retrieved from the memory. and anti-collision means for handing over an upper layer message to an application indicated by said application information for processing. The application information indicating the default application that is implicitly made current when the anti-collision process is completed and activated, is stored in the memory, and the anti-collision means stores only the application information indicating the default application. can be retrieved from the memory, the contactless communication device according to claim 1, wherein the upper layer message is handed over to the default application for processing. The application information indicating the anti-collision application that is implicitly current in the anti-collision process is stored in the memory, and the anti-collision means retrieves the application information indicating the default application regardless of whether or not the application information indicates the default application. 3. The contactless communication device according to claim 2, wherein, when the application information indicating the anticollision application can be retrieved from the memory, the upper layer message is handed over to the anticollision application for processing. A contactless chip to be mounted on the contactless communication device according to any one of claims 1 to 3. A step a in which a means for performing anti-collision processing in a contactless communication device receives a device selection command containing an upper layer message in anti-collision processing, the means receives application information indicating an application to be implicitly made current A method of processing an upper layer message, comprising: a procedure b for retrieving from a memory; and a procedure c for passing the upper layer message to an application indicated by the application information retrieved from the memory for processing. In the procedure b, the means retrieves from the memory only the application information indicating the default application that is implicitly made current when the anti-collision process ends and becomes active. 6. The method of processing an upper layer message according to claim 5, wherein the upper layer message is handed over to an application for processing. In step b, the means searches the memory for application information indicating an anti-collision application implicitly current in anti-collision processing. 7. The method of processing an upper layer message according to claim 6, wherein the upper layer message is handed over to the anti-collision application for processing regardless of whether retrieval is successful.

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