JP2008097291A - Communications apparatus and method for transmitting/receiving data - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent secret information from being read out, even when an unauthorized reader approaches, on the basis of data-receiving timing and detection timing of light or sound. <P>SOLUTION: A proximity communication part 101 transmits/receives data to/from a proximity communication part 151 in a reader/writer 150. An operation state acquisition part 102 images an image of an operation state notifying part 152. An analysis part 103 analyzes the image data of the image photographed by the operation state acquiring part 102; and when an analysis result indicating the light emission of the operation state notifying part 152 is obtained, outputs the analysis result to a communication control part 105. The communication control part 105 determines whether the processing of the received data is to be continued, on the basis of data-receiving timing and the light emission timing of the operation state communicating part 152 which is the analysis result. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a communication device and a data transmission / reception method, and more particularly to a communication device and a data transmission / reception method that can communicate with a reader / writer by making proximity to the reader / writer and perform settlement with electronic money.

  Conventionally, it is known that information is prevented from being skimmed from an IC card placed in a pocket or the like by executing communication processing when ambient light is detected by an optical sensor (for example, patents) Reference 1). Here, skimming refers to illegally reading and copying information recorded on an IC card.

  Conventionally, when a reader / writer detects an interrogation signal emitted by another reader / writer nearby, it can normally receive a response from the wireless tag by delaying its own signal transmission timing. The thing is known (for example, patent document 2).

Conventionally, a reader / writer that changes display or sound according to an operation state such as when communication with a non-contact IC card succeeds or fails is known (for example, Patent Document 3).
JP 2005-32161 A JP 2003-150916 A JP 2002-197419 A

  However, the conventional apparatus has a problem in Patent Document 1 that there is no effect on skimming measures until the IC card is taken out of the pocket and stored in the pocket. Further, in Patent Document 2, since the interference state is resolved by delaying the signal transmission timing, the reader / writer for skimming can also receive the response from the wireless tag normally, and on the contrary, promote skimming. There is a problem of end. Moreover, in patent document 3, there exists a problem that skimming cannot be prevented only by changing a display or a sound.

  The present invention has been made in view of this point, and based on the timing of data reception and the timing of detection of a change in the light source or sound source on the reader side, even if an unauthorized reader is approaching, confidential information fraud is performed. An object of the present invention is to provide a communication device and a data transmission / reception method that can be prevented.

  The communication device according to the present invention includes a receiving unit that receives data transmitted from the communication partner by approaching the communication partner, and a state of the light source provided in the communication partner with the transmission changes. Whether to continue processing the received data based on detection means for detecting a change in state, timing at which the reception means has received the data, and timing at which the detection means has detected a change in the state of the light source And a data processing control means for determining whether or not.

  Further, the communication device of the present invention includes a receiving unit that receives data transmitted from the communication partner by approaching the communication partner, and the state of the sound source provided in the communication partner is changed with the transmission. Continues processing of the received data based on detection means for detecting a change in the state of the sound source, timing at which the reception means has received the data, and timing at which the detection means has detected a change in the state of the sound source And a data processing control means for determining whether or not to do so.

  The data transmission / reception method of the present invention includes a step in which the communication device receives data transmitted from the communication partner when the communication device approaches the communication partner of the communication device, and is provided in the communication partner with the transmission. The communication device detects the change in the state of the light source when the state of the light source changes, and the timing at which the data is received and the timing at which the change in the state of the light source is detected. And a step of determining whether or not to continue processing of the received data.

  The data transmission / reception method of the present invention includes a step in which the communication device receives data transmitted from the communication partner when the communication device approaches the communication partner of the communication device, and the communication partner with the transmission. The communication device detects a change in the state of the sound source when the state of the sound source provided in the device changes, and the timing at which the data is received and the timing at which the change in the state of the sound source is detected, Determining whether to continue processing the received data in the communication device.

  According to the present invention, it is possible to prevent confidential information fraud even when an unauthorized reader is approaching based on the timing of data reception and the timing of detection of a change in the light source or sound source on the reader side.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
The first embodiment is characterized by detecting skimming by an unauthorized reader / writer based on the data reception timing and the light detection timing.

  FIG. 1 is a block diagram showing configurations of communication apparatus 100 and reader / writer 150 according to Embodiment 1 of the present invention. The communication device 100 according to the first embodiment is an IC card having a communication function, for example.

  First, the configuration of the communication apparatus 100 will be described.

  The proximity communication unit 101 serving as a reception unit includes, for example, an antenna, and transmits and receives data to and from the proximity communication unit 151 of the reader / writer 150 described later. Specifically, the proximity communication unit 101 transmits data input from the communication control unit 105, receives data transmitted from the proximity communication unit 151, and outputs the received data to the communication control unit 105. Further, the proximity communication unit 101 enters a communicable range with the proximity communication unit 151 of the reader / writer 150 when the communication device 100 approaches the reader / writer 150, and thereby the radio wave radiated from the proximity communication unit 151 is transmitted. It can receive and transmit / receive data to / from the proximity communication unit 151. Here, the data transmitted / received between the proximity communication unit 101 and the proximity communication unit 151 are data for detection of the communication device 100, data for mutual authentication between the communication device 100 and the reader / writer 150, and information. Data for reading and writing.

  The operation state acquisition unit 102 serving as a detection unit is, for example, a camera, and outputs a detection result such as a captured image to the analysis unit 103. For example, the operation state acquisition unit 102 captures the operation state notification unit 152 when the state of the operation state notification unit 152 that is a light source changes with the transmission of data from the reader / writer 150, and the captured image The image data is output to the analysis unit 103 as a detection result. Here, the change in the state of the operation state notification unit 152 includes light emission, extinction, dimming, or color change in the operation state notification unit 152. In addition, the operation state acquisition unit 102 provides only a change in the state of the operation state notification unit 152 of the reader / writer 150 existing in front of the communication device 100 when the operation state notification unit 152 captures an image by providing a light guide plate. Make it detectable. That is, the operation state acquisition unit 102 prevents erroneous detection of light incident from the side of a light source or the like provided in an unauthorized reader / writer 190.

  The analysis unit 103 serving as a detection unit analyzes the detection result input from the operation state acquisition unit 102, and when an analysis result in which the state of the operation state notification unit 152 is changed is obtained, the analysis result is transmitted to the communication control unit. To 105.

  The information holding unit 104 stores unique information such as an identification number unique to the communication device 100, and outputs the stored unique information to the communication control unit 105 in accordance with a read instruction from the communication control unit 105 and performs communication control. Data input from the unit 105 is stored.

  The communication control unit 105, which is a data processing control unit, determines whether or not the proximity is based on the comparison result between the reception timing of the data input from the proximity communication unit 101 and the detection timing of the state change in the analysis result input from the analysis unit 103. It is determined whether or not to continue processing for data input from the communication unit 101. If the communication control unit 105 determines that the process is to be stopped, the communication control unit 105 determines that another reader / writer 190 is approaching for skimming, stops the subsequent processes, and updates the data. If it is, the data is returned to the state before the update, and the display unit 106 is instructed to display information indicating that the data is transmitted from an unauthorized communication partner. Further, the communication control unit 105 reads out the unique information from the information holding unit 104 and outputs the specific information to the proximity communication unit 101, and also transmits data related to the communication result with the proximity communication unit 151 via the proximity communication unit 101 to the information holding unit 104. Output.

  The display unit 106 serving as a notification unit displays information indicating that data is being transmitted from an unauthorized communication partner in accordance with an instruction from the communication control unit 105.

  Next, the configuration of the reader / writer 150 will be described.

  The proximity communication unit 151 includes an antenna, for example, and transmits / receives data to / from the proximity communication unit 101 of the communication device 100. Specifically, the proximity communication unit 151 transmits data input from the communication control unit 153, receives data transmitted from the proximity communication unit 101, and outputs the received data to the communication control unit 153. The proximity communication unit 151 always radiates radio waves in order to detect the approach of the communication device 100.

  The operation state notification unit 152 is, for example, an LED, and changes the state by light emission, extinction, dimming, or color change when the proximity communication unit 151 transmits data.

  The communication control unit 153 reads out data such as identification information from the information holding unit 154 and outputs the data to the proximity communication unit 151, and changes the state when transmitting data from the proximity communication unit 151 to the operation state notification unit 152. Instruct them to change. In addition, the communication control unit 153 outputs data related to the communication result with the proximity communication unit 101 via the proximity communication unit 151 to the information holding unit 154.

  The information holding unit 154 stores unique information such as identification information unique to the reader / writer 150, outputs the stored unique information to the communication control unit 153, and data related to the communication result input from the communication control unit 153 Remember. Further, the information holding unit 154 outputs communication history information to the communication unit 155 based on the information regarding the communication result stored at a predetermined timing.

  The communication unit 155 transmits the communication history information input from the information holding unit 154 to an external device.

  Next, operations of the communication apparatus 100 and the reader / writer 150 will be described with reference to FIG. FIG. 2 is a sequence diagram illustrating operations of the communication apparatus 100 and the reader / writer 150. Note that the vertical axis in FIG. 2 is time, and time elapses as it goes downward. In FIG. 2, the operation state acquisition unit 102 is a camera and the operation state notification unit 152 is an LED, and the operation state notification unit 152 emits light as the reader / writer 150 transmits data. To do.

  First, the proximity communication unit 151 of the reader / writer 150 transmits question data (step ST201). At this time, the operation state notification unit 152 of the reader / writer 150 emits light.

  Next, the near field communication unit 101 of the communication device 100 receives the question data and reports to the communication control unit 105 that the question data has been received (question detection report) (step ST202).

  Receiving the report, the communication control unit 105 instructs the proximity communication unit 101 to transmit response data that is a response to the question data (response transmission instruction) (step ST203). At this time, the communication control unit 105 reads the identifier for identifying the communication device 100 stored in the information holding unit 104 from the information holding unit 104 and outputs the read identifier to the near field communication unit 101.

  Next, the proximity communication unit 101 transmits response data in accordance with an instruction from the communication control unit 105 (step ST204).

  On the other hand, in step ST201, the operation state acquisition unit 102 detects light emission of the operation state notification unit 152 when the reader / writer 150 transmits the question data (step ST205).

  Next, the operation state acquisition unit 102 takes an image and outputs image data of an image acquired by the imaging to the analysis unit 103. The operation state acquisition unit 102 completes the output of image data for one frame of the captured image within the predetermined time α (step ST206). Note that the operation state acquisition unit 102 completes output of image data for one frame of an image captured every predetermined time α even when the operation state notification unit 152 does not emit light.

  Next, the analysis unit 103 performs image analysis, and outputs an analysis result to the communication control unit 105 when the analysis result that the operation state notification unit 152 emits light is obtained (light emission detection report) (step) ST207). As an image analysis method, for example, the analysis unit 103 stores an image captured every time an image is captured, compares the luminance difference between the image captured last time and the image captured this time for each pixel, When the number of pixels whose luminance difference is greater than or equal to the threshold value is greater than or equal to the predetermined number, it is determined that the analysis result that the operation state notification unit 152 emits light is obtained.

Next, based on the timing at which the question data is received and the timing at which the operation state notification unit 152 detects the light emission, the communication control unit 105 causes the reader / writer 150 that has transmitted the question data to transmit and receive data. It is determined whether or not the reader / writer is to be performed, that is, whether or not the reader / writer is to be skimmed. Specifically, the communication control unit 105 determines that transmission is from the legitimate reader / writer 150 when Expression (1) is satisfied, and determines that transmission is from the unauthorized reader / writer 150 when Expression (1) is not satisfied. To do.
T1min−T0 ≦ T1 ≦ T1max−T0 (1)

  However, T1min is the time from the time when the operation state acquisition unit 102 completes outputting one frame of image data until the analysis result emitted by the operation state notification unit 152 is input to the communication control unit 105. T0 is a standard time from the time when the proximity communication unit 151 of the reader / writer 150 transmits data until the report that receives the question data is input to the communication control unit 105 of the communication apparatus 100. T1max is the time from when the proximity communication unit 151 of the reader / writer 150 transmits data until the analysis result emitted by the operation state notification unit 152 is input to the communication control unit 105. T1 is the time from the time when the report that received the question data is input to the communication control unit 105 in step ST202 to the time when the analysis result emitted by the operation state notification unit 152 is input to the communication control unit 105 in step ST207. is there. The communication control unit 105 obtains T1 as a time difference between the timing at which the light emission is detected and the timing at which the question data is received, and determines whether an unauthorized reader / writer is attempting skimming.

  When it is determined that the expression (1) is not satisfied, the near field communication unit 101 stops the data processing after the determination, and returns to the state before the data is updated when the data is updated.

  Next, the near field communication unit 151 of the reader / writer 150 transmits mutual authentication processing data (step ST208). At this time, the operation state notification unit 152 of the reader / writer 150 emits light.

  Next, the near field communication unit 101 of the communication device 100 receives the mutual authentication processing data, outputs the received mutual authentication processing data to the communication control unit 105, and the communication control unit 105 starts mutual authentication (mutual authentication). Authentication start) (step ST209).

  Next, the communication control unit 105 generates encrypted data composed of a predetermined random number in order to confirm whether or not the communication apparatus 100 wishes to transmit / receive data to / from the mutual authentication processing data. The encrypted data is output to the near field communication unit 101 (step ST210).

  Next, the near field communication unit 101 transmits the encrypted data (step ST211).

  On the other hand, in step ST208, the operation state acquisition unit 102 of the communication apparatus 100 detects light emission of the operation state notification unit 152 when the reader / writer 150 transmits mutual authentication processing data (step ST212).

  Next, the operation state acquisition unit 102 takes an image and outputs image data of an image acquired by the imaging to the analysis unit 103. The operation state acquisition unit 102 completes the output of the image data for one frame of the captured image within the predetermined time α (step ST213). Note that the operation state acquisition unit 102 completes output of image data for one frame of an image captured every predetermined time α even when the operation state notification unit 152 does not emit light.

  Next, the analysis unit 103 performs image analysis, and outputs an analysis result to the communication control unit 105 when the analysis result that the operation state notification unit 152 emits light is obtained (light emission detection report) (step) ST214).

Next, the communication control unit 105 determines that the reader / writer 150 that has transmitted the question data based on the timing at which the mutual authentication processing data is received and the timing at which the operation state notification unit 152 detects the light emission causes the communication device 100 to transmit the data. It is determined whether or not the reader / writer wants to perform transmission / reception, that is, whether or not the reader / writer is trying to skimm. Specifically, the communication control unit 105 determines that transmission is from the legitimate reader / writer 150 when Expression (2) is satisfied, and determines that transmission is from the unauthorized reader / writer 150 when Expression (2) is not satisfied. To do.
T2min−T0 ≦ T2 ≦ T2max−T0 (2)

  However, T2min is the time from when the operation state acquisition unit 102 completes outputting image data for one frame until the analysis result emitted by the operation state notification unit 152 is input to the communication control unit 105. T0 is a standard time from when the proximity communication unit 151 of the reader / writer 150 transmits data until the mutual authentication processing data is input to the communication control unit 105 of the communication device 100. T2max is the time from when the proximity communication unit 151 of the reader / writer 150 transmits data until the analysis result emitted by the operation state notification unit 152 is input to the communication control unit 105. T2 is the time from when the mutual authentication processing data is input at step ST209 to when the analysis result emitted by the operation state notification unit 152 is input at step ST214. The communication control unit 105 obtains T2 as a time difference between the timing at which the light emission is detected and the timing at which the mutual authentication processing data is received, and determines whether an unauthorized reader / writer is attempting skimming.

  When the proximity communication unit 101 determines that the expression (2) is not satisfied, the proximity communication unit 101 stops the data processing after the determination, and returns to the state before the data is updated when the data is updated.

  Next, the near field communication unit 151 of the reader / writer 150 transmits data for information update processing (step ST215). At this time, the operation state notification unit 152 of the reader / writer 150 emits light. For example, the proximity communication unit 151 transmits data for performing processing to reduce electronic money stored in the information holding unit 104 of the communication device 100 by 50 yen as data for information update processing.

  Next, the proximity communication unit 101 of the communication device 100 receives data for the information update process, outputs the received data for the information update process to the communication control unit 105, and the communication control unit 105 updates the information update process. Is started (information update start) (step ST216).

  Next, the communication control unit 105 instructs the proximity communication unit 101 to transmit response data that is a response to the data for the information update process (response transmission instruction) (step ST217).

  Next, proximity communication section 101 transmits response data in accordance with an instruction from communication control section 105 (step ST218).

  On the other hand, the operation state acquisition unit 102 of the communication apparatus 100 detects light emission of the operation state notification unit 152 when the reader / writer 150 transmits data for information update processing in step ST215 (step ST219).

  Next, the operation state acquisition unit 102 takes an image and outputs image data of an image acquired by the imaging to the analysis unit 103. The operation state acquisition unit 102 completes outputting image data for one frame of the captured image within a predetermined time α. (Step ST220). Note that the operation state acquisition unit 102 completes output of image data for one frame of an image captured every predetermined time α even when the operation state notification unit 152 does not emit light.

  Next, analysis unit 103 performs image analysis, and when an analysis result emitted by operation state notification unit 152 is obtained, the analysis result is output to communication control unit 105 (emission detection report) (step ST221). .

Next, the communication control unit 105 transmits the data for the information update process based on the timing at which the data for the information update process is received and the timing at which the operation state notification unit 152 detects the light emission. However, it is determined whether or not the communication device 100 is a reader / writer that wants to transmit and receive data, that is, whether or not the reader / writer is trying to skimm. Specifically, the communication control unit 105 determines that transmission is from the legitimate reader / writer 150 when Expression (3) is satisfied, and determines that transmission is from the unauthorized reader / writer 150 when Expression (3) is not satisfied. To do.
T3min−T0 ≦ T3 ≦ T3max−T0 (3)

  However, T3min is the time from when the operation state acquisition unit 102 completes outputting image data for one frame until the analysis result emitted by the operation state notification unit 152 is input to the communication control unit 105. T0 is a standard time from the time when the proximity communication unit 151 of the reader / writer 150 transmits data until the data for information update processing is input to the communication control unit 105 of the communication apparatus 100. T3max is the time from when the proximity communication unit 151 of the reader / writer 150 transmits data until the analysis result emitted by the operation state notification unit 152 is input to the communication control unit 105. T3 is the time from when the data for the information update process is input at step ST216 to when the analysis result emitted by the operation state notification unit 152 is input at step ST221. The communication control unit 105 obtains T3 as a time difference between the timing at which light emission is detected and the timing at which data for information communication processing is received, and determines whether an unauthorized reader / writer is attempting skimming. The time required for the processing from step ST201 to step ST218 is, for example, 0.1 sec.

  When the proximity communication unit 101 determines that the expression (3) is not satisfied, the proximity communication unit 101 stops the data processing after the determination, and returns to the state before the data is updated when the data is updated.

From the above formulas (1) to (3), a general formula for determining whether or not the reader / writer 150 that has transmitted the data received by the communication apparatus 100 is an unauthorized reader / writer is as follows: become.
Tmin−T0 ≦ Ti ≦ Tmax−T0 (i = 1, 2, 3,...) (4)

  However, T0 is a standard time from when the reader / writer 150 transmits data until the communication control unit 105 of the communication apparatus 100 recognizes reception of the data. Tmin is the shortest time from when the operation state notification unit 152 emits light until the communication control unit 105 of the communication apparatus 100 recognizes light emission of the operation state notification unit 152. Tmax is the longest time from when the operation state notification unit 152 emits light until the communication control unit 105 of the communication apparatus 100 recognizes light emission of the operation state notification unit 152. Ti is the time from when the communication control unit 105 of the communication device 100 recognizes the reception of data until the communication control unit 105 of the communication device 100 recognizes the light emission of the operation state notification unit 152. The communication control unit 105 obtains Ti as a time difference between the timing at which light emission is detected and the timing at which data for information communication processing is received, and determines whether an unauthorized reader / writer is attempting skimming.

  When the proximity communication unit 101 determines that the expression (4) is not satisfied, the proximity communication unit 101 stops the data processing after the determination, and returns to the state before the data is updated when the data is updated.

  Next, the operation of the communication apparatus 100 will be described with reference to FIG. FIG. 3 is a flowchart showing the operation of the communication apparatus 100. In FIG. 3, it is assumed that the operation state acquisition unit 102 is a camera and the operation state notification unit 152 is an LED.

  First, the communication control unit 105 determines whether or not there is a report indicating that the question data has been received from the proximity communication unit 101, that is, whether or not a question has been detected (step ST301).

  If no question is detected, the process of step ST301 is repeated. On the other hand, if a question is detected, communication control section 105 instructs proximity communication section 101 to transmit response data, and proximity communication section 101 transmits response data (step ST302).

  Next, communication control section 105 determines whether or not analysis result emitted from operation state notifying section 152 is input from analysis section 103, that is, whether or not light emission from operation state notifying section 152 has been detected (step ST303). ).

  When the light emission is not detected, the communication control unit 105 stops the data processing started by receiving the question data, and returns to the state before the data is updated when the data is updated ( Original restoration) (step ST305).

  On the other hand, when light emission is detected, the communication control unit 105 determines whether or not T1 in the equation (1) satisfies the equation (1), that is, whether or not T1 is appropriate (step ST304).

  When T1 is not valid, the communication control unit 105 cancels the data processing started by receiving the question data, and returns to the state before the data is updated when the data is updated ( Original restoration) (step ST305).

  On the other hand, if T1 is valid, communication control section 105 determines whether or not mutual authentication processing data has been input, that is, whether or not mutual authentication has started (step ST306).

  If the mutual authentication has not started, the communication control unit 105 cancels the data processing started by receiving the question data, and if the data has been updated, the state before the data is updated (Restore the original state) (step ST305).

  On the other hand, when mutual authentication is started, the communication control unit 105 performs mutual authentication processing (step ST307).

  Next, communication control section 105 determines whether or not there is an input of an analysis result emitted from operation state notification section 152 from analysis section 103, that is, whether or not light emission from operation state notification section 152 has been detected (step ST308). ).

  When the light emission is not detected, the communication control unit 105 stops the data processing started by receiving the question data, and returns to the state before the data is updated when the data is updated ( Original restoration) (step ST305).

  On the other hand, when light emission is detected, communication control section 105 determines whether or not T2 in equation (2) satisfies equation (2), that is, whether or not T2 is appropriate (step ST309).

  If T2 is not valid, the communication control unit 105 cancels the data processing started by receiving the question data, and returns to the state before the data is updated when the data is updated ( Original restoration) (step ST305).

  On the other hand, when T2 is valid, communication control section 105 determines whether or not data for information update processing has been input, that is, whether or not information update has started (step ST310).

  If the information update has not started, the communication control unit 105 cancels the data processing started by receiving the question data, and if the data has been updated, the state before the data is updated (Restore the original state) (step ST305).

  On the other hand, when the information update is started, the communication control unit 105 performs an information update process (step ST311).

  Next, communication control section 105 determines whether or not an analysis result emitted from operation state notification section 152 has been input from analysis section 103, that is, whether or not light emission from operation state notification section 152 has been detected (step ST312). ).

  When the light emission is not detected, the communication control unit 105 stops the data processing started by receiving the question data, and returns to the state before the data is updated when the data is updated ( Original restoration) (step ST305).

  On the other hand, when light emission is detected, the communication control unit 105 determines whether or not T3 in the equation (3) satisfies the equation (3), that is, whether or not T3 is appropriate (step ST313).

  When T3 is not valid, the communication control unit 105 cancels the data processing started by receiving the question data, and returns to the state before the data is updated when the data is updated ( Original restoration) (step ST305).

  On the other hand, when T3 is appropriate, the communication control unit 105 continues the process until the predetermined information update process is completed.

  Here, the original restoration is, for example, when the electronic money stored in the information holding unit 104 is reduced by 50 yen due to shopping or the like, the electronic money stored in the information holding unit 104 is reduced by 50 yen It is to return to the amount before.

  As described above, according to the first embodiment, even if an unauthorized reader is approaching based on the data reception timing and the timing at which the change in the state of the operation state notification unit 152 is detected, the secret information fraud Can be prevented. Further, according to the first embodiment, since the operation state acquisition unit 102 is provided with the light guide plate so that light incident from the side is not detected, the unauthorized reader / writer 190 and the operation state notification unit 152 In the case of having the same function, it is possible to reduce the possibility that an unauthorized change in the state of the light source of the reader / writer 190 is erroneously detected as a change in the state of the light source of the legitimate reader / writer.

(Embodiment 2)
The second embodiment is characterized in that skimming by an unauthorized reader / writer is detected based on a data reception timing and a timing for detecting a change in the state of a sound source provided in the reader.

  The configurations of the communication device 100 and the reader / writer 150 according to the second embodiment are such that the operation state acquisition unit 102 has a function of detecting sound and the operation state notification unit 152 has a function of emitting sound. Since this is the same as FIG. 1, a detailed description of its configuration is omitted.

  The operation state acquisition unit 102 serving as a detection unit is, for example, a microphone, detects a change in the state of the operation state notification unit 152 of the reader / writer 150, and outputs the detection result to the analysis unit 103. For example, the operation state acquisition unit 102 detects the changed state when the state of the operation state notification unit 152 that is a sound source is changed with the transmission of data from the reader / writer 150, and analyzes the detection result. To 103. Here, the change in the state of the operation state notification unit 152 includes the generation of a sound in the operation state notification unit 152 and a change in the timbre of the generated sound. In addition, the operation state acquisition unit 102 can detect only a change in the state of the operation state notification unit 152 of the reader / writer 150 existing in front of the communication device 100 by providing a sound insulating plate. That is, the operation state acquisition unit 102 prevents erroneous detection of sound from the side of a sound source or the like provided in the unauthorized reader / writer 190. In addition, the sound is not limited to the case where a sound insulation board is provided in the operation state acquisition unit 102, and the sound emitted from the operation state notification unit 152 of the reader / writer is illegal by making it have a high directivity, for example, a high frequency such as an ultrasonic wave. The sound produced by the reader / writer 190 wearing a legitimate reader / writer may be difficult to circulate into the operation state acquisition unit 102 from the side.

  The communication control unit 105 inputs from the proximity communication unit 101 based on the comparison result between the reception timing of the data input from the proximity communication unit 101 and the detection timing of the state change in the analysis result input from the analysis unit 103. It is determined whether or not to continue processing the data. If the communication control unit 105 determines that the process is to be stopped, the communication control unit 105 determines that another reader / writer 190 is approaching for skimming, stops the subsequent processes, and updates the data. If it is, the data is returned to the state before the update, and the display unit 106 is instructed to display information indicating that the data is transmitted from an unauthorized communication partner. Further, the communication control unit 105 reads out the unique information from the information holding unit 104 and outputs the specific information to the proximity communication unit 101, and also transmits data related to the communication result with the proximity communication unit 151 via the proximity communication unit 101 to the information holding unit 104. Output.

  The operation state notification unit 152 is a speaker, for example, and generates a sound when the proximity communication unit 151 transmits data, or changes a timbre of the generated sound to a timbre different from the case of other processing, etc. Change state.

  The communication control unit 153 reads data such as identification information from the information holding unit 154 and outputs the data to the proximity communication unit 151 and instructs the operation state notification unit 152 to change the state. In addition, the communication control unit 153 outputs data related to the communication result with the proximity communication unit 101 via the proximity communication unit 151 to the information holding unit 154.

  Next, operations of the communication apparatus 100 and the reader / writer 150 will be described with reference to FIG. FIG. 4 is a sequence diagram showing operations of communication apparatus 100 and reader / writer 150 according to Embodiment 2 of the present invention. In addition, the vertical axis | shaft of FIG. 4 is time, and time shall pass as it goes below. In FIG. 4, it is assumed that the operation state acquisition unit 102 is a microphone and the operation state notification unit 152 is a speaker, and the operation state notification unit 152 emits a sound as the reader / writer 150 transmits data. Explained as an example.

  First, the proximity communication unit 151 of the reader / writer 150 transmits question data (step ST401). At this time, the operation state notification unit 152 of the reader / writer 150 emits a sound.

  Next, the near field communication unit 101 of the communication device 100 receives the question data and reports to the communication control unit 105 that the question data has been received (question detection report) (step ST402).

  Receiving the report, communication control section 105 instructs proximity communication section 101 to transmit response data that is a response to the question data (response transmission instruction) (step ST403). At this time, the communication control unit 105 reads the identifier for identifying the communication device 100 stored in the information holding unit 104 from the information holding unit 104 and outputs the read identifier to the near field communication unit 101.

  Next, proximity communication section 101 transmits response data in accordance with an instruction from communication control section 105 (step ST404).

  On the other hand, in step ST401, the operation state acquisition unit 102 of the communication apparatus 100 detects a sound generated by the operation state notification unit 152 when the reader / writer 150 transmits question data (step ST405).

  Next, operation state acquisition section 102 detects the sound emitted from operation state notification section 152, and outputs the detection result to analysis section 103 (step ST406). Note that the operation state acquisition unit 102 detects sound every predetermined time even when the operation state notification unit 152 does not emit sound.

  Next, the analysis unit 103 performs sound analysis, and outputs an analysis result to the communication control unit 105 when a result of the operation state notification unit 152 emitting a sound is obtained (light emission detection report) (step) ST407). As a sound analysis method, for example, when the sound emitted by the operation state notification unit 152 is set to a specific frequency that does not occur when people are talking, the analysis unit 103 detects the specific frequency. In addition, it is determined that an analysis result indicating that the operation state notification unit 152 is generating sound has been obtained.

Next, the communication control unit 105 determines that the reader / writer 150 that has transmitted the question data based on the timing at which the question data is received and the timing at which the operation state notification unit 152 detects the sound, It is determined whether or not the reader / writer wants to perform transmission / reception, that is, whether or not the reader / writer is trying to skimm. Specifically, the communication control unit 105 determines that transmission is from the legitimate reader / writer 150 when Expression (5) is satisfied, and determines that transmission is from the unauthorized reader / writer 150 when Expression (5) is not satisfied. To do.
0 ≦ T11 ≦ T20 (5)

  However, T11 is the time from the input of the report that received the question data in step ST402 to the input of the analysis result of the sound emitted by the operation state notifying unit 152 in step ST407. T20 is a threshold value that is a predetermined time. The communication control unit 105 obtains T11 as a time difference between the timing at which the sound generated by the operation state notification unit 152 is detected and the timing at which the question data is received, and determines whether an unauthorized reader / writer is attempting skimming. .

  When the proximity communication unit 101 determines that the expression (5) is not satisfied, the proximity communication unit 101 stops the data processing after the determination, and returns to a state before the data is updated when the data is updated.

  Next, the near field communication unit 151 of the reader / writer 150 transmits mutual authentication processing data (step ST408). At this time, the operation state notification unit 152 of the reader / writer 150 emits a sound.

  Next, the near field communication unit 101 of the communication device 100 receives the mutual authentication processing data, outputs the received mutual authentication processing data to the communication control unit 105, and the communication control unit 105 starts mutual authentication (mutual authentication). Authentication start) (step ST409).

  Next, the communication control unit 105 generates encrypted data composed of a predetermined random number in order to confirm whether or not the communication apparatus 100 wishes to transmit / receive data to / from the mutual authentication processing data. The encrypted data is output to the near field communication unit 101 (step ST410).

  Next, the near field communication unit 101 transmits the encrypted data (step ST411).

  On the other hand, in step ST408, the operation state acquisition unit 102 of the communication apparatus 100 detects a sound generated by the operation state notification unit 152 when the reader / writer 150 transmits mutual authentication processing data (step ST412).

  Next, the operation state acquisition unit 102 detects sound and outputs the detection result to the analysis unit 103 (step ST413).

  Next, the analysis unit 103 performs sound analysis, and outputs an analysis result to the communication control unit 105 when the analysis result is a sound emitted from the operation state notification unit 152 (light emission detection report) ( Step ST414).

Next, the communication control unit 105 determines that the reader / writer 150 that has transmitted the mutual authentication data based on the timing at which the mutual authentication processing data is received and the timing at which the operation state notification unit 152 generates sound is transmitted to the communication device 100. Is a reader / writer that wants to send and receive data, that is, whether or not it is an unauthorized reader / writer trying to skimm. Specifically, the communication control unit 105 determines that the transmission is from the legitimate reader / writer 150 when the expression (6) is satisfied, and determines that the transmission is from the unauthorized reader / writer 150 when the expression (6) is not satisfied. To do.
0 ≦ T12 ≦ T20 (6)

  However, T12 is the time from when the mutual authentication process data is input at step ST409 to when the analysis result of the sound emitted by the operation state notifying unit 152 is input at step ST414. T20 is a threshold value that is a predetermined time. The communication control unit 105 obtains T12 as a time difference between the timing at which the sound generated by the operation state notification unit 152 is detected and the timing at which the mutual authentication processing data is received, and determines whether or not an unauthorized reader / writer is attempting skimming. to decide.

  When the proximity communication unit 101 determines that the expression (6) is not satisfied, the proximity communication unit 101 stops the data processing after the determination, and returns to the state before the data is updated when the data is updated.

  Next, the near field communication unit 151 of the reader / writer 150 transmits data for information update processing (step ST415). At this time, the operation state notification unit 152 of the reader / writer 150 emits a sound. For example, the proximity communication unit 151 transmits data for performing processing to reduce electronic money stored in the information holding unit 104 of the communication device 100 by 50 yen as data for information update processing.

  Next, the proximity communication unit 101 of the communication device 100 receives data for the information update process, outputs the received data for the information update process to the communication control unit 105, and the communication control unit 105 updates the information update process. Is started (information update start) (step ST416).

  Next, communication control section 105 instructs proximity communication section 101 to transmit response data that is a response to data for information update processing (response transmission instruction) (step ST417).

  Next, proximity communication section 101 transmits response data in accordance with an instruction from communication control section 105 (step ST418).

  On the other hand, in step ST415, the operation state acquisition unit 102 of the communication apparatus 100 detects a sound generated by the operation state notification unit 152 when the reader / writer 150 transmits data for information update processing (step ST419).

  Next, the operation state acquisition unit 102 detects sound and outputs the detection result to the analysis unit 103 (step ST420). The operation state acquisition unit 102 performs sound detection every predetermined time even when the operation state notification unit 152 does not emit sound.

  Next, the analysis unit 103 performs sound analysis, and outputs an analysis result to the communication control unit 105 when the analysis result is a sound emitted from the operation state notification unit 152 (light emission detection report) ( Step ST421).

Next, the communication control unit 105 transmits the data for the information update process based on the timing of receiving the data for the information update process and the timing of detecting the sound generated by the operation state notification unit 152. The writer 150 determines whether or not the communication device 100 is a reader / writer that wants to send and receive data, that is, whether or not the reader / writer is an unauthorized reader / writer that is going to skimm. Specifically, the communication control unit 105 determines that the transmission is from the legitimate reader / writer 150 when the expression (7) is satisfied, and determines that the transmission is from the unauthorized reader / writer 150 when the expression (7) is not satisfied. To do.
0 ≦ T13 ≦ T20 (7)

  However, T13 is the time from when the data for the information update process is input at step ST416 to when the analysis result of the sound emitted by the operation state notification unit 152 is input at step ST421. T20 is a threshold value that is a predetermined time. The communication control unit 105 obtains T13 as a time difference between the timing at which the sound generated by the operation state notification unit 152 is detected and the timing at which data for information update processing is received, and whether an unauthorized reader / writer is trying to skimm. Judge whether or not. The time required for the processing from step ST401 to step ST418 is, for example, 0.1 sec.

  When it is determined that the expression (7) is not satisfied, the near field communication unit 101 stops the data processing after the determination, and returns to a state before the data is updated when the data is updated.

From the above formulas (5) to (7), a general formula for determining whether or not the reader / writer 150 that has transmitted the data received by the communication device 100 is an unauthorized reader / writer is as follows: become.
0 ≦ Ti ≦ T20 (i = 1, 2, 3,...) (8)

  However, Ti is the time from when the communication control unit 105 of the communication device 100 recognizes the reception of data until the communication control unit 105 of the communication device 100 recognizes the sound generated by the operation state notification unit 152. T20 is a threshold value that is a predetermined time. The communication control unit 105 obtains Ti as a time difference between the timing at which the sound generated by the operation state notification unit 152 is detected and the timing at which data is received, and determines whether an unauthorized reader / writer is attempting skimming.

  When it is determined that the expression (8) is not satisfied, the near field communication unit 101 stops the data processing after the determination, and returns to the state before the data is updated when the data is updated.

  Next, the operation of the communication apparatus 100 will be described with reference to FIG. FIG. 5 is a flowchart showing the operation of the communication apparatus 100.

  First, the communication control unit 105 determines whether or not there is a report that the question data has been received from the proximity communication unit 101, that is, whether or not a question has been detected (step ST501).

  If no question is detected, the process of step ST501 is repeated. On the other hand, when a question is detected, communication control section 105 instructs proximity communication section 101 to transmit response data, and proximity communication section 101 transmits response data (step ST502).

  Next, communication control section 105 determines whether or not the operation state acquisition section 102 has detected a sound emitted from operation state notification section 152 (step ST503).

  If no sound is detected, the communication control unit 105 stops the data processing started by receiving the question data, and returns to the state before the data is updated if the data is updated ( Original restoration) (step ST505).

  On the other hand, if a sound is detected, communication control section 105 determines whether or not T11 in equation (5) satisfies equation (5), that is, whether or not T11 is appropriate (step ST504).

  If T11 is not valid, the communication control unit 105 stops the data processing started by receiving the question data, and returns to the state before the data is updated when the data is updated ( Original restoration) (step ST505).

  On the other hand, if T11 is valid, communication control section 105 determines whether or not mutual authentication processing data has been input, that is, whether or not mutual authentication has started (step ST506).

  If the mutual authentication has not started, the communication control unit 105 cancels the data processing started by receiving the question data, and if the data has been updated, the state before the data is updated (Restore the original state) (Step ST505).

  On the other hand, when mutual authentication is started, communication control section 105 performs mutual authentication processing (step ST507).

  Next, communication control section 105 determines whether or not the operation state acquisition section 102 has detected a sound emitted by operation state notification section 152 (step ST508).

  If no sound is detected, the communication control unit 105 stops the data processing started by receiving the question data, and returns to the state before the data is updated if the data is updated ( Original restoration) (step ST505).

  On the other hand, when a sound is detected, communication control section 105 determines whether or not T12 in equation (6) satisfies equation (6), that is, whether or not T12 is appropriate (step ST509).

  If T12 is not valid, the communication control unit 105 stops the data processing started by receiving the question data, and returns to the state before the data is updated when the data is updated ( Original restoration) (step ST505).

  On the other hand, when T12 is valid, communication control section 105 determines whether or not data for information update processing has been input, that is, whether or not information update has started (step ST510).

  If the information update has not started, the communication control unit 105 cancels the data processing started by receiving the question data, and if the data has been updated, the state before the data is updated (Restore the original state) (Step ST505).

  On the other hand, when the information update is started, the communication control unit 105 performs an information update process (step ST511).

  Next, communication control section 105 determines whether or not the sound generated by operation state notification section 152 has been detected by operation state acquisition section 102 (step ST512).

  If no sound is detected, the communication control unit 105 stops the data processing started by receiving the question data, and returns to the state before the data is updated if the data is updated ( Original restoration) (step ST505).

  On the other hand, when the sound is detected, the communication control unit 105 determines whether or not T13 in the equation (7) satisfies the equation (7), that is, whether or not T13 is appropriate (step ST513).

  If T13 is not valid, the communication control unit 105 cancels the data processing started by receiving the question data, and returns to the state before the data is updated when the data is updated ( Original restoration) (step ST505).

  On the other hand, when T13 is valid, the communication control unit 105 continues the process until the predetermined information update process is completed.

  As described above, according to the second embodiment, by comparing the data reception timing with the timing at which the change in the state of the operation state notification unit 152 is detected, it is possible to keep the secret even when an unauthorized reader is approaching. Information fraud can be prevented. In addition, according to the second embodiment, since the sound from the side is not detected by providing a sound insulation board or the like in the operation state acquisition unit 102, the unauthorized reader / writer 190 is the same as the operation state notification unit 152. In the case of having this function, it is possible to reduce the possibility that an unauthorized change in the state of the sound source of the reader / writer 190 is erroneously detected as a change in the state of the sound source of the valid reader / writer.

(Embodiment 3)
FIG. 6 is a block diagram showing a configuration of communication apparatus 600 according to Embodiment 3 of the present invention. In the third embodiment, the configuration of the reader / writer is the same as that of the reader / writer 150 in FIG.

  The third embodiment is characterized in that, in a communication device having a mobile phone function, skimming by an unauthorized reader / writer is detected based on a data reception timing and a timing at which a change in the state of a light source provided in the reader is detected. It is what.

  The proximity communication unit 607, the information holding unit 608, the analysis unit 609, and the communication control unit 610 that are reception units constitute an IC card function unit 611.

  The microphone 601 outputs the input voice as a voice signal to the control unit 606 according to the control of the control unit 606.

  The antenna unit 602 outputs the received signal to the control unit 606 and transmits the signal input from the control unit 606.

  The display unit 603 serving as a notification unit is, for example, a liquid crystal screen, and displays information necessary for functioning as a mobile phone such as a telephone number under the control of the control unit 606. The display unit 603 displays information indicating that data is being transmitted from an unauthorized communication partner in accordance with an instruction from the communication control unit 610. The display unit 603 displays an image of image data input from the control unit 606.

  The camera 604 serving as detection means performs imaging under the control of the control unit 606, and outputs image data of the captured image to the control unit 606. Further, the camera 604 captures the operation state notification unit 152 when the state of the operation state notification unit 152 serving as a light source changes with the transmission of data from the reader / writer 150, and the image data of the captured image is obtained. It outputs to the analysis part 609 as a detection result. Here, the change in the state of the operation state notification unit 152 includes light emission, extinction, dimming, or color change in the operation state notification unit 152.

  The mobile phone function unit 605 performs modulation processing and demodulation processing on the signal for the mobile phone according to the control of the control unit 606, and performs predetermined processing in the mobile phone such as cell search.

  The control unit 606 controls the microphone 601, the antenna unit 602, the display unit 603, the camera 604, the mobile phone function unit 605, and the IC card function unit 611 as a whole. When the control unit 606 detects an incoming call from the call partner or a call to the call partner, the control unit 606 switches so that the communication device 600 can be used as a mobile phone. In addition, when the control unit 606 detects a signal transmitted from the reader / writer 150, the control unit 606 controls the communication device 600 to be used as an IC card. That is, the control unit 606 performs switching control between the mobile phone function and the IC card function. Furthermore, the control unit 606 controls the display unit 603 to display the image of the image data input from the camera 604 while outputting the audio signal input from the microphone 601 to the mobile phone function unit 605.

  The proximity communication unit 607 includes, for example, an antenna, and transmits / receives data to / from the proximity communication unit 151 of the reader / writer 150. Specifically, the proximity communication unit 607 transmits data input from the communication control unit 610, receives data transmitted from the proximity communication unit 151, and outputs the received data to the communication control unit 610. In addition, the proximity communication unit 607 enters a communicable range with the proximity communication unit 151 of the reader / writer 150 when the communication device 600 approaches the reader / writer 150, and thereby the radio wave radiated from the proximity communication unit 151 is transmitted. It can receive and transmit / receive data to / from the proximity communication unit 151. Here, the data transmitted / received to / from the proximity communication unit 151 by the proximity communication unit 607 includes data for detection of the communication device 600, data for mutual authentication between the communication device 600 and the reader / writer 150, and information Data for reading and writing.

  The information holding unit 608 stores unique information such as an identification number unique to the communication device 600, and outputs the stored unique information to the communication control unit 610 in accordance with a read instruction from the communication control unit 610, and communication control Data input from the unit 610 is stored.

  The analysis unit 609 serving as a detection unit analyzes the detection result input from the camera 604 and outputs the analysis result to the communication control unit 610 when an analysis result in which the state of the operation state notification unit 152 is changed is obtained. To do.

  The communication control unit 610 that is a data processing control unit includes a proximity communication unit based on a comparison result between the reception timing of the data input from the proximity communication unit 607 and the light detection timing in the analysis result input from the analysis unit 609. It is determined whether or not to continue processing on the data input from 607. If the communication control unit 610 determines that the process is to be stopped, the communication control unit 610 determines that another reader / writer 190 is approaching for skimming, stops the subsequent processes, and updates the data. If it is, the data is returned to the state before the update, and the display unit 603 is instructed to display information indicating that the data is transmitted from an unauthorized communication partner. Further, the communication control unit 610 reads out the unique information from the information holding unit 608 and outputs it to the near field communication unit 607, and also transmits data related to the communication result with the near field communication unit 151 via the near field communication unit 607 to the information holding unit 608. Output.

  The operations of the communication device 600 and the reader / writer 150 are the same as those in FIG. 2, and the operation of the communication device 600 is the same as that in FIG.

  As described above, according to the third embodiment, in addition to the effects of the first embodiment, since both the functions of the mobile phone and the IC card are provided, the device having the mobile phone function and the IC card function are provided. There is no need to carry the device separately, and the usability can be improved. Further, according to the third embodiment, since the display unit and the camera can be used both as a mobile phone and as an IC card, the number of parts can be reduced and the cost can be reduced. it can.

(Embodiment 4)
FIG. 7 is a block diagram showing a configuration of communication apparatus 700 according to Embodiment 4 of the present invention.

  Communication apparatus 700 according to Embodiment 4 includes communication apparatus 600 according to Embodiment 3 shown in FIG. 6 and has microphone 701 instead of microphone 601 as shown in FIG. A camera 702, an analysis unit 703 instead of the analysis unit 609, and a communication control unit 704 instead of the communication control unit 610. In FIG. 7, parts having the same configuration as in FIG.

  The fourth embodiment is characterized in that, in a communication device having a mobile phone function, skimming by an unauthorized reader / writer is detected based on a data reception timing and a timing for detecting a change in the state of a sound source provided in the reader. It is what.

  The proximity communication unit 607, the information holding unit 608, the analysis unit 703, and the communication control unit 704 constitute an IC card function unit 705.

  The microphone 701 detects sound including sound according to the control of the control unit 606, outputs the detected sound to the control unit 606, and outputs the detection result to the analysis unit 703.

  The camera 702 captures images according to the control of the control unit 606, and outputs image data of the captured images to the control unit 606.

  The control unit 606 controls the antenna unit 602, the display unit 603, the camera 702, the mobile phone function unit 605, the microphone 701, and the entire IC card function unit 705. Further, the control unit 606 controls the communication device 700 so that it can be used as a mobile phone when it detects incoming and outgoing calls, and when it detects a signal transmitted from the reader / writer 150, the communication device 700 Control so that it can be used as an IC card. That is, the control unit 606 performs switching control between the mobile phone function and the IC card function. Further, the control unit 606 outputs the audio signal input from the microphone 701 to the operation state notification unit 152 (not shown) and controls the display unit 603 to display the image of the image data input from the camera 702.

  The analysis unit 703 analyzes the detection result input from the microphone 701 and outputs the analysis result to the communication control unit 704 when an analysis result obtained by changing the state of the operation state notification unit 152 serving as a sound source is obtained. Here, the change in the state of the operation state notification unit 152 includes the generation of a sound in the operation state notification unit 152 and a change in the timbre of the generated sound.

  The communication control unit 704 serving as a data processing control unit is configured to change the proximity based on the comparison result between the reception timing of the data input from the proximity communication unit 607 and the detection timing of the state change in the analysis result input from the analysis unit 703. It is determined whether or not to continue processing for data input from the communication unit 607. If the communication control unit 704 determines that the process is to be stopped, the communication control unit 704 determines that another reader / writer 190 is approaching for skimming, stops the subsequent processes, and updates the data. If it is, the data is returned to the state before the update, and the display unit 603 is instructed to display information indicating that the data is transmitted from an unauthorized communication partner. Further, the communication control unit 704 outputs data related to a communication result with the proximity communication unit 151 via the proximity communication unit 607 to the information holding unit 608.

  The proximity communication unit 607 includes, for example, an antenna, and transmits / receives data to / from the proximity communication unit 151 of the reader / writer 150. Specifically, the proximity communication unit 607 transmits data input from the communication control unit 704, receives data transmitted from the proximity communication unit 151, and outputs the received data to the communication control unit 704. Further, the proximity communication unit 607 enters a communicable range with the proximity communication unit 151 of the reader / writer 150 when the communication device 700 approaches the reader / writer 150, and thereby the radio wave radiated from the proximity communication unit 151 is transmitted. It can receive and transmit / receive data to / from the proximity communication unit 151. Here, the data transmitted / received to / from the proximity communication unit 151 by the proximity communication unit 607 includes data for detection of the communication device 700, data for mutual authentication between the communication device 700 and the reader / writer 150, and information. Data for reading and writing.

  The information holding unit 608 stores unique information such as an identification number unique to the communication device 700, outputs the stored unique information to the communication control unit 704 in accordance with a read instruction from the communication control unit 704, and performs communication control. Data input from the unit 704 is stored.

  The operations of the communication device 700 and the reader / writer 150 are the same as those in FIG. 2, and the operation of the communication device 700 is the same as that in FIG.

  As described above, according to the fourth embodiment, in addition to the effects of the second embodiment, since both the functions of the mobile phone and the IC card are included, the device having the mobile phone function and the IC card function are provided. There is no need to carry the device separately, and the usability can be improved. Further, according to the fourth embodiment, since the display unit and the microphone can be shared for use as a mobile phone and for use as an IC card, the number of parts can be reduced and the cost can be reduced. it can.

  In the fourth embodiment, the camera 702 is provided. However, the present invention is not limited to this, and the camera may not be provided.

  In the first to fourth embodiments, skimming is detected by either one of the case of detecting the change of the state of the light source by the camera and the case of detecting the change of the state of the sound source by the microphone. However, the present invention is not limited to this, and skimming may be detected both when the change of the light source state is detected by the camera and when the change of the sound source state is detected by the microphone. In the first to fourth embodiments, when it is determined that skimming is performed, information indicating that data is transmitted from an unauthorized communication partner is displayed. It is possible to notify that skimming has been performed by various methods such as notification of information indicating that data is being transmitted from the other communication partner by sound.

  The communication device and the data transmission / reception method according to the present invention are suitable for, for example, communicating with a reader / writer by being close to the reader / writer and making a settlement with electronic money.

The block diagram which shows the structure of the communication apparatus and reader / writer which concern on Embodiment 1 of this invention. The sequence diagram which shows operation | movement of the communication apparatus and reader / writer which concern on Embodiment 1 of this invention. The flowchart which shows operation | movement of the communication apparatus which concerns on Embodiment 1 of this invention. The sequence diagram which shows operation | movement of the communication apparatus and reader / writer which concern on Embodiment 2 of this invention. The flowchart which shows operation | movement of the communication apparatus which concerns on Embodiment 2 of this invention. The block diagram which shows the structure of the communication apparatus and reader / writer which concern on Embodiment 3 of this invention. The block diagram which shows the structure of the communication apparatus and reader / writer which concern on Embodiment 4 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Communication apparatus 101,151 Proximity communication part 102 Operation | movement state acquisition part 103 Analysis part 104,154 Information holding part 105,153 Communication control part 106 Display part 150 Reader / writer 152 Operation | movement state notification part 155 Communication part 190 Other reader / writers

Claims (13)

Receiving means for receiving data transmitted from the communication partner by approaching the communication partner;
Detecting means for detecting a change in the state of the light source when the state of the light source provided in the communication partner changes with the transmission;
Data processing control means for determining whether or not to continue processing the received data based on the timing at which the data is received by the receiving means and the timing at which the detection means detects a change in the state of the light source; ,
A communication apparatus comprising:   The data processing control means continues the processing of the received data when the time difference between the timing at which the change in the state of the light source is detected and the timing at which the data is received is within a predetermined time. The communication device according to claim 1, wherein the processing of the received data is stopped when it is not within.   The communication device according to claim 1, wherein the detection unit detects the change in the state of the light source by capturing the light source and analyzing the captured image. The receiving means receives a plurality of types of the data for performing different processes transmitted from a communication partner,
The detection means detects a change in the state of the light source when the state of the light source changes with the transmission of each of a plurality of types of data that perform different processing,
The communication apparatus according to any one of claims 1 to 3, wherein the data processing control unit determines whether or not to continue processing the data for each of a plurality of types of the data that are received and processed differently.   The communication device according to claim 1, wherein the detection unit detects light emission of the light source as a change in a state of the light source.   The information processing device according to any one of claims 1 to 5, further comprising notification means for notifying that data is being transmitted from an unauthorized communication partner when the data processing control means determines to stop processing the received data. The communication apparatus in any one. Receiving means for receiving data transmitted from the communication partner by approaching the communication partner;
Detecting means for detecting a change in the state of the sound source when the state of the sound source provided in the communication partner changes with the transmission;
Data processing control means for determining whether to continue processing the received data based on the timing at which the data is received by the receiving means and the timing at which the detection means detects a change in the state of the sound source; ,
A communication apparatus comprising:   The data processing control means continues the processing of the received data when the time difference between the timing of detecting the change in the state of the sound source and the timing of receiving the data is within a predetermined time, and the time difference is the predetermined time The communication device according to claim 6, wherein the processing of the received data is stopped when it is not within. The receiving means receives a plurality of types of the data for performing different processes transmitted from a communication partner,
The detection means detects a change in the state of the sound source when the state of the sound source is changed with the transmission of each of the plurality of types of data performing different processing,
The communication apparatus according to claim 7 or 8, wherein the data processing control unit determines whether or not to continue processing of the data for each of the plurality of types of the data that are received and processed differently.   The communication device according to claim 7, wherein the detection unit detects a sound generated from the sound source as a change in the state of the sound source. Control means for switching to the function of the mobile phone when transmitting a signal for the mobile phone or receiving a signal for the mobile phone;
Mobile phone function means for modulating or demodulating the signal for the mobile phone when switching to the function of the mobile phone by the control means;
The communication apparatus according to claim 1, comprising: The communication device receives data transmitted from the communication partner when the communication device approaches the communication partner of the communication device; and
The communication device detecting a change in the state of the light source when the state of the light source provided in the communication partner changes with the transmission; and
Determining whether or not to continue processing the received data in the communication device based on the timing of receiving the data and the timing of detecting a change in the state of the light source;
A data transmission / reception method comprising: The communication device receives data transmitted from the communication partner when the communication device approaches the communication partner of the communication device; and
The communication device detecting a change in the state of the sound source when the state of the sound source provided in the communication partner changes with the transmission;
Determining whether or not to continue processing the received data in the communication device based on the timing of receiving the data and the timing of detecting a change in the state of the sound source;
A data transmission / reception method comprising:

Images