JP4234035B2 - IC tag management system - Google Patents

Description

  The present invention transmits issuing means for issuing a new random number ID in accordance with an issuing rule unique to its own IC tag terminal every time a predetermined number of times are issued, and tag information including the issued random number ID and time information. The present invention relates to an IC tag management system in which tag information is received from each of a plurality of IC tag terminals provided with transmission means and stored in an accumulated manner.

  Conventionally, in data management, data communication, and the like, encryption techniques using various methods are used in order to prevent data leakage and improve security reliability.

  For example, in order to prevent unauthorized access to a computer system due to forgery of an identification number printed on a voucher, a technique for preparing a plurality of encryption patterns and encrypting the identification number with a pattern determined by a random number is known. (See Patent Document 1).

On the other hand, various types using a non-contact type data carrier that performs short-range wireless communication between an IC tag attached to a mobile body and a reader (IC tag communication device) installed at a predetermined position. Technology is known. In this data carrier, the reader identifies the mobile body by performing wireless communication with an IC tag attached to the mobile body and reading the identification information stored in the IC tag. For this reason, by attaching an IC tag to a product (moving body) by bonding or the like, it is possible to comprehensively manage everything from the manufacture / production route of the product in the manufacturer to the distribution route in delivery and the inventory / settlement management in the store.
JP-A-8-96049

  However, the management benefits are mainly on the merchant side. The problem is on the consumer side. The IC tag is likely to be attached in a state where it is difficult to be removed by being embedded in the product or adhered, taking into consideration the possibility that the product (moving body) is handled in a rough manner. For example, a method of embedding or imprinting and attaching an ultra-small IC tag of about 2 mm square on the cover of a book as a product.

  Therefore, a consumer who has purchased a product (mobile body) with an IC tag attached may be traced as long as the product is held. That is, unless the IC tag is removed from the product, if short-range wireless communication (data carrier) is performed, it is possible to identify which product is located when and where.

  Certainly, a method of encrypting the ID of the IC tag and concealing the ID is conceivable. However, as long as the ID is fixed, the possibility that the ID is overlooked cannot be denied. Further, if the ID is fixed and the encryption key is also fixed, the encrypted data is fixed and therefore has the same meaning as the ID.

  The present invention has been made in view of these problems, and an object of the present invention is to theoretically make it impossible to identify an IC tag based only on IC tag data obtained by one short-range wireless communication. This prevents illegal tracking of the IC tag.

The first invention for solving the above-described problem is that an issuing means for issuing a new random number ID in accordance with an issuing rule specific to its own IC tag terminal every time a predetermined number of times is issued, an issued random number ID, An IC tag management system that receives tag information from each of a plurality of IC tag terminals provided with transmitting means for transmitting tag information including time information, and stores the tag information in an accumulative manner.
Management means (for example, the processing device 510 shown in FIG. 10) for managing the issuing rules specific to each IC tag terminal;
Based on the issuance order of random number IDs according to time information and the issuance rule for each IC tag terminal managed by the managing unit, a combination of random number IDs included in the accumulated tag information is stored in the managing unit. By comparing with all the random number ID sequences managed by the ID tag, it is determined whether the tag information is transmitted from the IC tag terminal, and specifying means for specifying the correspondence between the IC tag terminal and the tag information (for example, Processing apparatus 510) shown in FIG.
It is characterized by having.

  According to the first invention, the IC tag management system manages the issuance rules unique to each IC tag terminal, and is based on the issuance rule for each IC tag terminal and the issuance order of the random number ID according to the time information. Thus, it is possible to specify the correspondence relationship between the IC tag terminal that has transmitted the stored tag information and the tag information. According to this, since the IC tag terminal transmits tag information including the random number ID issued according to the issuing rules specific to the IC tag terminal, the situation where the position of the IC tag terminal is grasped and illegally tracked is prevented. can do.

The second invention is a tag information including issuing means for issuing a new random number ID according to a random number ID sequence unique to its own IC tag terminal every time a predetermined number of times are issued, and the issued random number ID and time information An IC tag management system that receives tag information from each of a plurality of IC tag terminals each having a transmitting means for transmitting and stores the tag information in an accumulative manner,
Management means (for example, the processing device 510 shown in FIG. 10) for managing a random number ID sequence unique to each IC tag terminal;
Based on the issuance order of random number IDs according to time information and the random number ID string for each IC tag terminal managed by the management unit, a combination of random number IDs included in the cumulatively stored tag information is managed by the management By identifying all the random number ID sequences managed by the means , it is determined whether the tag information is transmitted from the IC tag terminal, and a specifying means for specifying the correspondence between the IC tag terminal and the tag information (for example, , A processing device 510) shown in FIG.
It is characterized by having.

  According to the second invention, the IC tag management system manages a random number ID sequence unique to each IC tag terminal, the random number ID sequence for each IC tag terminal, Based on the above, it is possible to specify the correspondence relationship between the tag information and the IC tag terminal that has transmitted the accumulated tag information. According to this, since the IC tag terminal transmits tag information including a random number ID issued in accordance with a random number ID sequence unique to the IC tag terminal, the situation where the position of the IC tag terminal is grasped and illegally tracked is detected. Can be prevented.

A third invention is the IC tag management system of the first or second invention,
The IC tag terminal further includes encryption means for encrypting the transmission data with an encryption key unique to the terminal itself, and the transmission means further includes the transmission data encrypted by the encryption means in the tag information. Means to
The management means includes key management means for managing a decryption key unique to each IC tag terminal,
The identifying means decrypts the encrypted transmission data included in the tag information with a decryption key managed by the key management means to identify the IC tag terminal that has transmitted the tag information. Having means,
It is characterized by that.

  According to the third aspect of the invention, the decryption key unique to each IC tag terminal is managed, and the encrypted outgoing data included in the tag information is decrypted with the decryption key for each IC tag terminal, The IC tag terminal that has transmitted the tag information can be specified.

According to a fourth aspect of the present invention, a plurality of tag reading devices that perform near field communication with an IC tag terminal and receive tag information from the IC tag terminal and a server system including the management unit and the specifying unit are connected in communication. An IC tag management system according to claim 3 configured as described above,
The tag reading device includes identification information transmitting means for transmitting identification information of the own tag reading device to the IC tag terminal,
In the IC tag terminal, the encryption unit encrypts at least the identification information transmitted by the identification information transmission unit of the tag reader in the transmission data, and the transmission unit converts the encrypted transmission data into the tag information. Including
The server system specifies the movement path of the IC tag terminal based on the identification information in the transmission data included in the tag information according to the correspondence between the IC tag terminal specified by the specifying means and the tag information. It further comprises a movement path specifying means,
It is characterized by that.

  According to the fourth invention, the server system determines the movement route of the IC tag terminal based on the identification information in the outgoing data included in the tag information according to the correspondence between the IC tag terminal and the tag information. Can be identified.

A fifth invention is the IC tag management system of the fourth invention,
The identification information of the tag reading device includes at least position information for specifying an installation position of the tag reading device.

  According to the fifth aspect, the movement route of the IC tag terminal can be specified by the position information specifying the installation position of the tag reading device.

  According to the present invention, the IC tag management system manages the issuance rules unique to each IC tag terminal, and stores based on the issuance rules for each IC tag terminal and the issuance order of the random number ID according to the time information. It is possible to specify the correspondence between the IC tag terminal that transmitted the stored tag information and the tag information. Alternatively, the IC tag management system manages a random number ID sequence unique to each IC tag terminal, and accumulatively, based on the random number ID sequence for each IC tag terminal and the issue order of random number IDs according to time information. The correspondence between the IC tag terminal that has transmitted the stored tag information and the tag information can be specified. According to this, since the IC tag terminal transmits tag information including the random number ID issued according to the issuing rule specific to the IC tag terminal or the random number ID string, the position of the IC tag terminal is grasped and illegally tracked. Can be prevented.

  Hereinafter, an IC tag management system to which the present invention is applied will be described in detail with reference to the drawings. In the following, in order to more easily explain the tracking of a mobile object to which an IC tag is attached, the mobile ticket is assumed to be a mobile terminal, and the station ticket gate through which the user has passed the travel route of the user carrying the mobile terminal. A case where the present invention is applied to a railway facility managed in accordance with the passing order will be described.

[System outline]
FIG. 1 is a schematic diagram showing a system configuration of the IC tag management system 1. The IC tag management system 1 shown in FIG. 1 is connected to a plurality of tag readers 30 (30-1, 30-2,...) Installed at a station ticket gate and the tag reader 30 via a communication line N. The tag management server system 50 (server system) is provided, and each tag reader 30 communicates with the mobile terminal 10 carried by the customer. More specifically, the portable terminal 10 has an IC tag built therein, and each tag reader 30 performs short-range wireless communication with the IC tag.

  Each tag reading device 30 stores a reading device ID for identifying the tag reading device 30. On the other hand, the IC tag built in the portable terminal 10 stores the order of random number IDs uniquely assigned to the IC tag (hereinafter referred to as “random number ID string”). An ID for identifying the IC tag is issued. Specifically, one random number ID is selected from the random number ID string and set as the current random number ID. Then, at a predetermined timing (for example, after one transmission of tag information described later), the next random number ID of the current random number ID is selected from the random number ID sequence, and the selected random number ID is newly set as the current random number. Set to ID. Therefore, it is theoretically impossible to identify an IC tag based only on IC tag data obtained by one short-range wireless communication.

  FIG. 2 is a diagram for explaining the flow of data in the IC tag management system 1. As shown in FIG. 2, when a user passes a station ticket gate, if the portable terminal 10 to be carried is brought close to the tag reading device 30 installed at the station ticket gate, the tag reading device 30 and the portable terminal 10 are built in. Short-distance wireless communication is performed with the IC tag, and 1) a reader ID as position information is transmitted from the tag reader 30 to the mobile terminal 10. Accordingly, 2) tag information including the current random number ID, time information, and transmission data including the reading device ID transmitted from the tag reading device 30 is transmitted from the portable terminal 10 to the tag reading device 30. The 3) Tag information transmitted from the portable terminal 10 is transferred to the tag management server system 50 via the communication line N by the tag reader 30.

  In the tag management server system 50, the tag information transferred from the tag reader 30 as described above is stored and stored, and the portable terminals carried by all users registered as users of the IC tag management system 1 10 manages a random number ID sequence stored in an IC tag built in the apparatus 10.

  The tag management server system 50 identifies the correspondence between each tag information stored and stored as described above and the mobile terminal 10 that has transmitted the tag information. Further, the tag management server system 50 passes the ticket gate that the user has passed based on the reading device ID included in the transmission data of the tag information in accordance with the correspondence relationship between the identified tag information and the IC tag. The order (that is, the movement route when the user uses the railway facility) is specified.

  FIG. 3 is a schematic diagram of a railway facility. Here, with respect to the principle of specifying the passing order of the station ticket gates through which the user has passed, as shown in FIG. 3, the user carrying the mobile terminal 10A is station S1 ticket gate → station S1 Shinkansen ticket gate → station S5 Shinkansen ticket gate. A user carrying the mobile terminal 10B in the order of the station S10 ticket gate, a user carrying the mobile terminal 10C in the order of the station S3 ticket gate, the station S5 Shinkansen ticket gate, the station S13 Shinkansen ticket gate, and the station S13 ticket gate → A case where the train passes through the station S21 Shinkansen ticket gate → the station S21 ticket gate will be described as an example. When each user passes the station ticket gate, the tag reader provided at the station ticket gate and the portable terminals 10A to 10C carried by the user are brought close to each other to perform short-range wireless communication.

  FIG. 4A is a diagram showing an example of a random number ID string assigned to an IC tag built in each of the mobile terminals 10A to 10C carried by each customer, and FIG. FIG. 6 is a diagram illustrating an example of tag information that is transmitted from the mobile terminals 10 </ b> A to 10 </ b> C and transferred to the tag management server system 50 by the tag reading device 30 when passing through each station ticket gate. In FIG. 4B, the station ticket gates where the mobile terminals 10A to 10C that have actually transmitted the tag information and the tag reader 30 that has transferred the tag information are shown in parentheses.

  The tag management server system 50 performs processing for collating the combinations of random number IDs included in all accumulated and stored tag information with the random number ID sequences of all customers. FIG. 5 is a diagram illustrating a combination of tag information collated with any random number ID string of the mobile terminals 10A to 10C when 11 pieces of tag information shown in FIG. 4B are received. When the tag information combination is collated with the random number ID string, the tag management server system 50 sets the order of the reading device IDs indicated by the combination as a candidate for the passing order of the station ticket gates through which the corresponding customer passes. .

  In this way, the tag management server system 50 accumulates and stores the received tag information as needed, and collates the combination of random IDs included in each accumulated and stored tag information with the random IDs of all customers. By performing the process, a candidate for a correspondence relationship between each tag information and the mobile terminal 10 that has transmitted the tag information is obtained. Then, by repeatedly performing the matching process, candidates for the corresponding relationship are narrowed down and finally identified. Further, according to the correspondence between the identified tag information and the IC tag, the passing order of the station ticket gates through which the customer has passed is specified based on the reading device ID included in the transmission data of the tag information.

[Function configuration]
Next, the functional configuration of the mobile terminal 10 will be described. FIG. 6 is a diagram illustrating a configuration of main functional blocks of the mobile terminal 10. The mobile terminal 10 includes an input device 110, a processing device 120, a display device 130, a storage device 140, and an IC tag 150. The mobile terminal 10 may be any device with an IC tag embedded therein, and is realized by, for example, a PDA, a mobile phone, an IC card, or the like.

  The input device 110 is realized by operation keys to which various functions are assigned, and outputs an operation signal corresponding to the key operation to the processing device 120.

  The processing device 120 is constituted by a CPU or the like, and performs overall control of the portable terminal 10 by giving instructions to each functional unit constituting the portable terminal 10 and transferring data. Specifically, a processing program corresponding to an operation signal or the like input from the input device 110 is read from the storage device 140 and executed, and the processing result is stored in the storage device 140.

  The display device 130 is a display device such as an LCD (Liquid Crystal Display) or ELD (Electronic Luminescent Display), and displays various screens based on display signals input from the processing device 120.

  The storage device 140 is configured by a nonvolatile semiconductor memory such as a flash ROM, and stores various processing programs related to the operation of the mobile terminal 10 and data such as processing results by the processing programs. The processing device 120 executes various processes based on the processing program and data read from the storage device 140.

  The IC tag 150 includes a memory 151, an antenna (not shown), a power supply circuit, a control circuit, and the like, and is close to the IC tag communication device 330 (see FIG. 9) built in the tag reader 30 by electromagnetic induction or the like. Distance wireless communication is performed, and data stored in the memory 151 is transmitted and received. The memory 151 stores a random number ID string 151a, a current random number ID 151b, and an encryption key 151c.

  In the random number ID column 151a, an array of random IDs uniquely assigned to the IC tag 150 is stored. FIG. 7 shows an example of the random number ID string 151a. In the random number ID sequence 151a shown in FIG. 7, random number IDs are stored in the order of “135”, “413”, “918”, “643” as the random number ID sequence assigned to the IC tag 150. The IC tag 150 sets a pointer to the first random number ID (“135” in FIG. 7) as an initial state. Here, the pointer is for designating the random number ID set in the current random number ID 151b in the random number ID string, and the IC tag 150 selects the random number ID designated by this pointer and displays the current random number ID. It is assumed that the random number ID 151b. Further, the IC tag 150 performs short-range wireless communication with the tag reading device 30 and transmits tag information to be described later, and then shifts the pointer to the next random number ID position so that the corresponding random number ID (FIG. 7) is displayed. Then, “413”) is selected and the current random number ID 151b is updated.

  In the encryption key 151c, an encryption key uniquely assigned to the IC tag 150 is stored. This encryption key 151c is used when encrypting outgoing data constituting the tag information. The applied encryption method is a known encryption method using the same encryption key for encryption and decryption, and the description thereof is omitted. The IC tag 150 encrypts the reading device ID transmitted from the IC tag communication device 330 built in the tag reading device 30 described later using a cryptographic key 151c by a predetermined encryption process, and transmits the obtained data. Tag information is generated as data.

  FIG. 8 is a diagram illustrating a data configuration example of tag information generated by the IC tag 150. As shown in FIG. 8, the tag information is configured by associating a random number ID, time information, and transmission data (reading device ID encrypted as described above). When the IC tag 150 receives the reading device ID from the IC tag communication device 330 built in the tag reading device 30, the IC tag 150 stores the random number ID stored in the current random number ID 151b, the time information at the time point, and the above-described information. Tag information is generated by associating with the transmission data which is the reader ID encrypted in this way. Then, the IC tag 150 performs short-range wireless communication again with the tag reading device 30 and transmits the generated tag information.

  Next, the functional configuration of the tag reading device 30 will be described. FIG. 9 is a diagram illustrating a configuration of main functional blocks of the tag reading device 30. The tag reading device 30 illustrated in FIG. 9 includes a communication device 310, a processing device 320, and an IC tag communication device 330.

  The communication device 310 transmits the data input from the IC tag communication device 330 to the tag management server system 50 (see FIG. 10) via the communication line N. Here, the communication line N means a communication path through which data can be exchanged. That is, the communication line N is meant to include a communication network such as a telephone communication network, a cable network, and the Internet in addition to a LAN using a dedicated line (dedicated cable) for direct connection or Ethernet (registered trademark). The communication method may be wired / wireless.

  The processing device 320 is constituted by a CPU or the like, and performs overall control of the IC tag reading device 30 by giving instructions to each functional unit constituting the IC tag reading device 30 and transferring data. Specifically, the processing device 320 executes processing for outputting data input from the IC tag communication device 330 to the communication device 310 and causing the tag management server system 50 to transmit the data.

  The IC tag communication device 330 includes a memory 331, an antenna (not shown), a control circuit, and the like. The memory 331 stores a reading device ID 331 a for identifying the tag reading device 30. The IC tag communication device 330 performs short-range wireless communication with the IC tag 150 built in the mobile terminal 10 that is in close proximity, transmits the reading device ID 331a stored in the memory 331 to the mobile terminal 10, and Tag information transmitted from the tag 150 is output to the processing device 320.

  Next, the functional configuration of the tag management server system 50 will be described. FIG. 10 is a diagram illustrating a configuration of main functional blocks of the tag management server system 50. The tag management server system 50 is configured based on a known server computer system, and includes a processing device 510 such as a CPU, a storage device 520 such as a hard disk, and a communication device 530 for connecting to a communication line N. It is configured.

  The storage device 520 provided in the tag management server system 50 stores an IC tag identification program 521, an IC tag management table 523, received tag information 525, and outgoing IC tag specifying data 527.

  The IC tag identification program 521 is a program for causing the processing device 510 to execute an IC tag identification process. In accordance with the IC tag identification program 521, the processing device 510 transmits the tag information transferred from the tag reading device 30 as described above and the mobile terminal 10 that has transmitted the tag information (specifically, the IC tag included in the mobile terminal 10). ) Is specified. That is, although details will be described later, the processing device 510 uses all random number ID strings stored in the IC tag management table 523 as combinations of random number IDs included in each tag information stored and stored in the received tag information 525. Is identified to identify the correspondence between each tag information and the mobile terminal 10 that has transmitted the tag information.

  The IC tag management table 523 manages information stored in the IC tag 150 built in the mobile terminal 10 of a customer registered as a user of the IC tag management system 1 (hereinafter referred to as “registered user”). It is a data table for doing. FIG. 11 shows an example of the IC tag management table 523. As shown in FIG. 11, the IC tag management table 523 is stored in the IC tag 150 built in the mobile terminal 10 of the corresponding registered user in association with the registered user number assigned to each registered user. A random number ID string and an encryption key are stored.

  The received tag information 525 stores and stores tag information transmitted from the tag reading device 30 connected to the tag management server system 50 via the communication line N. FIG. 12 is a diagram illustrating an example of the reception tag information 525. As shown in FIG. 12, the received tag information 525 is received in such a manner that the tag information transmitted from the IC tag 150 built in the portable terminal 10 via the tag reader 30 as described above is allocated in the order received. Accumulated and stored in association with the number.

  The outgoing IC tag specifying data 527 is a data table for specifying the mobile terminal 10 that has sent each tag information stored / stored in the received tag information 525. FIG. 13 is a diagram showing an example of the outgoing IC tag specifying data 527. The outgoing IC tag specifying data 527 includes candidate tag information setting tables 528 (528-1, 528-2,... For each registered user).・ ・) Is stored. In this candidate tag information setting table 528, the reception number of candidate tag information (candidate tag information) is set as the candidate reception number for each random number ID constituting the random number ID sequence stored in the corresponding IC tag 150. At the same time, a confirmation flag for setting “OFF” as an initial value is stored. Each time the tag information is transferred from the tag reader 30 and the received tag information 525 is updated, the processing device 510 refers to each candidate tag information setting table 528 stored in the outgoing IC tag specifying data 527, and The reception number assigned to the target tag information is set as the candidate reception number for the random number ID that matches the random number ID of the transferred tag information (target tag information).

[Operation]
Next, the operation of the IC tag management system 1 in the present embodiment will be described with reference to FIG. FIG. 14 is a diagram showing an operation flow of the IC tag management system 1.

  As shown in FIG. 14, first, the tag reading device 30 transmits the reading device ID to the IC tag 150 by short-range wireless communication with the IC tag 150 built in the mobile terminal 10 that is in close proximity (step a10). ).

  When the IC tag 150 built in the portable terminal 10 receives the reading device ID from the tag reading device 30 (step b10: YES), the received reading device ID is received using the encryption key 151c stored in the memory 151. Encryption is performed (step b20). Then, the IC tag 150 generates tag information associated with the random number ID stored in the current random number ID 151b and the time information at the time, using the encrypted reader ID as transmission data (step b30). The tag information generated by executing short-range wireless communication again with the reading device 30 is transmitted (step b40).

  Subsequently, the IC tag 150 selects the next random number ID of the random number ID stored in the current random number ID 151b from the random number ID string 151a, and updates the current random number ID 151b (step b50).

  On the other hand, in the tag reading device 30, when the IC tag communication device 330 receives the tag information transmitted by the IC tag 150 in step b40 described above (step a20: YES), the received tag information is output to the processing device 320 and processed. The device 320 performs control to transfer the tag information to the tag management server system 50 via the communication line N (step a30).

  In the tag management server system 50, when receiving the tag information from the tag reading device 30 (step c10: YES), the processing device 510 executes an IC tag identification process (step c20).

  Next, the flow of IC tag identification processing in the tag management server system 50 will be described with reference to FIG. This IC tag identification process is realized by the processing device 510 reading and executing the IC tag identification program 521. FIG. 15 is a diagram illustrating a processing flow of the processing device 510 of the tag management server system 50.

  First, the processing device 510 refers to each candidate tag information setting table stored in the outgoing IC tag specifying data 527, and assigns the candidate reception number for the random number ID that matches the random number ID of the target tag information to the target tag information. The received reception number is set (step c200).

  Subsequently, the processing device 510 executes the following processing for each candidate tag information setting table. That is, when the candidate reception number is set in each of the target candidate tag information setting table for a random number ID of a predetermined number or more (for example, 4 or more) in succession (step c210: YES), It is determined whether the time information of the corresponding candidate tag information is in chronological order.

  For example, as shown in the candidate tag information setting table 528-1 in FIG. 13, the processing device 510 assigns candidate reception numbers to four consecutive random number IDs “135”, “413”, “918”, and “643”, respectively. Is set, the reception tag information 525 is referred to, and it is determined whether or not the time information of the candidate tag information of each candidate reception number is in time series. More specifically, the processing device 510 determines whether the time information of the corresponding candidate tag information follows the time series when the candidate reception number for the random number ID “413” is “R050” and “R101”. Determine whether.

  If the processing device 510 determines that the time information of the candidate tag information is in chronological order (step c220: YES), the processing device 510 refers to the IC tag management table 523 and reads the encryption key based on the registered user number. (Step c230). Then, the processing device 510 decrypts the transmission data of each candidate tag information with the read encryption key, and when all the decryption of each candidate tag information is successful (step c240: YES), these candidate tag information The registered user confirms that it is transmitted from the portable terminal 10 carried by the registered user, and updates the confirmation flag to “ON” (step c250). At this time, the processing device 510 deletes candidate reception numbers other than the candidate tag information determined from the corresponding tag candidate setting table, and candidate reception numbers of candidate tag information determined from other tag candidate setting tables. And the outgoing IC tag specifying data 527 is updated.

  For example, the processing device 510 stores each candidate tag information of candidate reception numbers “R081,” “R101,” “R125,” and “R210” shown in the candidate tag information setting table 528-1 of FIG. When the decryption key is decrypted by using the encryption key of the registered user number “U001” set in “”, the candidate reception number “R050” is deleted from the candidate tag information setting table 528-1 and the confirmation flag is set to “ON”. In addition, the candidate reception numbers “R081,” “R101,” “R125,” and “R210” of candidate tag information determined from the other candidate tag information setting table 528-2,. The outgoing IC tag specifying data 527 is updated.

  On the other hand, if any of the transmission data of each candidate tag information is not decrypted with the read encryption key (step c240: NO), the processing device 510 returns to step c10 in FIG. Is transferred until the above-mentioned process is repeated.

  As described above, according to the present embodiment, in the mobile terminal 10, the IC tag 150 sequentially sets the random number ID according to the random number ID sequence uniquely assigned to the IC tag 150, and includes the tag including the random number ID. Information can be transmitted. Therefore, it is possible to theoretically disable the identification of the IC tag based only on the IC tag data obtained by one short-range wireless communication, and the situation where the position of the IC tag 150 is grasped and illegally tracked is prevented. can do.

  On the other hand, the tag management server system 50 can manage the random number ID sequences stored in the IC tags 150 built in the mobile terminals 10 of all registered users. In the tag management server system 50, tag information transmitted from the portable terminal 10 and transferred by the tag reader 30 is stored and stored, and a combination of random number IDs included in each stored and stored tag information Can be identified with the random number IDs of all the users to identify the correspondence between each tag information and the mobile terminal 10 that has transmitted the tag information. According to this, in accordance with the correspondence relationship between the identified tag information and the IC tag, based on the reading device ID included in the transmission data of the tag information, the passing order of the station ticket gate that the user has passed is identified, Can be managed.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to those described above, and can be changed as appropriate without departing from the spirit of the invention.

  For example, in the above-described embodiment, a unique encryption key is assigned to the IC tag 150 in advance, and the IC tag 150 encrypts outgoing data using this encryption key. However, the outgoing data is encrypted. The encryption key for this may be encrypted using a one-time password. Since this one-time password technique is a known technique, a description thereof is omitted here.

  Further, when the IC tag 150 encrypts the transmission data, first, the transmission data is processed using the current random number ID 151b (for example, the value of the current random number ID is added to the character code of each character constituting the transmission data). Thus, the first encryption may be performed, and the processed transmission data may be further encrypted using the encryption key assigned to the IC tag 150. In this case, in the tag management server system 50, the processing device 510 performs processing for decoding the transmission data and converting the transmission data into data before processing using the corresponding random number ID.

  Furthermore, a common encryption key may be stored in the IC tag 150 built in the tag management server system 50 and the portable terminals 10 carried by all registered users. Specifically, the IC tag 150 encrypts the generated tag information with a common encryption key. In the tag management server system 50, when the tag information is transferred from the tag reading device 30, the processing device 510 first decrypts the transferred tag information with the above-described common encryption key. According to this, since tag information encrypted with a common encryption key is exchanged, the security of communication on the communication line N can be further enhanced.

  In the above-described embodiment, a unique random number ID sequence is assigned to the IC tag 150 in advance, and the tag management server system 50 assigns it to the IC tag 150 built in the portable terminal 10 carried by all registered users. The random number ID sequence is managed, but instead of this random number ID sequence, a rule for issuing a random number ID unique to each IC tag 150 is defined, and the IC tag 150 sequentially issues a random number ID according to this issue rule. It is good to do. Specifically, a circuit (function) for issuing a random number ID may be incorporated in the IC tag 150. In this case, the tag management server system 50 manages the issuance rules defined in the IC tags 150 built in the portable terminals 10 carried by all registered users.

  Further, the short-range wireless communication with the same IC tag 150 is invalidated until a predetermined time elapses after the short-range wireless communication is performed between the tag reading device 30 and the IC tag 150. It is good. This is because communication may be repeatedly performed with the same tag reader 30 because the communication state is unstable.

  For example, while the mobile terminal 10 side holds the previous reading device ID of the tag reading device 30 as the previous value, the elapsed time since the tag information was transmitted is counted, and the predetermined time has not elapsed. When a reading device ID that matches the previous value is received, processing for transmitting tag information to the tag reading device 30 is not performed.

  Alternatively, the tag reader 30 may measure the elapsed time since the last short-distance wireless communication with the IC tag 150. In this case, the IC tag 150 keeps the reading device ID of the tag reading device 30 received last time as a previous value, and transmits and responds to the previous value when the reading device ID is received. When the tag reader 30 receives the reading device ID of its own tag reader 30 from the IC tag 150 while the elapsed time counted as described above does not elapse, the tag reader 30 reads the IC tag 150. The process of transmitting the device ID is not performed.

Schematic which shows the system configuration | structure of an IC tag management system. The figure for demonstrating the flow of the data in an IC tag management system. Schematic diagram of railway facilities. The figure for demonstrating the principle at the time of specifying the passage order of the station ticket gate which the user passed. The figure for demonstrating the principle at the time of specifying the passage order of the station ticket gate which the user passed. The figure which shows the structure of the main functional blocks of a portable terminal. The figure which shows an example of a random number ID sequence. The figure which shows an example of tag information. The figure which shows the structure of the main functional blocks of a tag reader. The figure which shows the structure of the main functional blocks of a tag management server system. The figure which shows an example of an IC tag management table. The figure which shows an example of receiving tag information. The figure which shows an example of the data for transmission IC tag specification. The figure which shows the operation | movement flow of an IC tag management system. The figure which shows an example of an IC tag identification process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 IC tag management system 10 Portable terminal 110 Input device 120 Processing device 130 Display device 140 Storage device 150 IC tag 151 Memory
151a Random number ID string
151b Current random number ID
151c Encryption key 30 Tag reading device 310 Communication device 320 Processing device 330 IC tag communication device 331 Memory
331a Reader ID
DESCRIPTION OF SYMBOLS 50 Tag management server system 510 Processing apparatus 520 Storage apparatus 521 IC tag identification program 523 IC tag management table 525 Reception tag information 527 Data for specifying outgoing IC tag 530 Communication apparatus

Claims (5)

Issuing means for issuing a new random number ID in accordance with an issuing rule specific to the IC tag terminal each time a predetermined number of times is issued, and transmitting means for transmitting tag information including the issued random number ID and time information An IC tag management system for receiving tag information from each of a plurality of IC tag terminals provided and storing the tag information cumulatively,
Management means for managing the issuing rules specific to each IC tag terminal;
Based on the issuance order of random number IDs according to time information and the issuance rule for each IC tag terminal managed by the managing unit, a combination of random number IDs included in the accumulated tag information is stored in the managing unit. A means for identifying the correspondence between the IC tag terminal and the tag information by collating with all random number ID sequences managed by
An IC tag management system comprising: An issuing means for issuing a new random number ID according to a random number ID sequence unique to its own IC tag terminal each time a predetermined number of times are issued, and a sending means for sending tag information including the issued random number ID and time information An IC tag management system that receives tag information from each of a plurality of IC tag terminals equipped with and stores the tag information cumulatively,
Management means for managing a random number ID sequence unique to each IC tag terminal;
Based on the issuance order of random number IDs according to time information and the random number ID string for each IC tag terminal managed by the management unit, a combination of random number IDs included in the cumulatively stored tag information is managed by the management Identifying means for identifying the correspondence between the IC tag terminal and the tag information by collating with all random number ID sequences managed by the means;
An IC tag management system comprising: The IC tag terminal further includes an encryption unit that encrypts transmission data with an encryption key unique to the terminal, and the transmission unit further includes the transmission data encrypted by the encryption unit in tag information. A means of sending,
The management means includes key management means for managing a decryption key unique to each IC tag terminal,
The identifying means decrypts the encrypted transmission data included in the tag information with a decryption key managed by the key management means to identify the IC tag terminal that has transmitted the tag information. Having means,
The IC tag management system according to claim 1 or 2, wherein A plurality of tag reading devices that perform short-range wireless communication with an IC tag terminal and receive tag information from the IC tag terminal, and a server system that includes the management unit and the specifying unit are connected and connected. 3. The IC tag management system according to 3,
The tag reading device includes identification information transmitting means for transmitting identification information of the own tag reading device to the IC tag terminal,
In the IC tag terminal, the encryption unit encrypts at least the identification information transmitted from the identification information transmission unit of the tag reader in the transmission data, and the transmission unit converts the encrypted transmission data into the tag information. Including
The server system specifies the movement path of the IC tag terminal based on the identification information in the transmission data included in the tag information according to the correspondence between the IC tag terminal specified by the specifying means and the tag information. It further comprises a movement path specifying means,
IC tag management system characterized by the above.   5. The IC tag management system according to claim 4, wherein the identification information of the tag reader includes at least position information for specifying an installation position of the tag reader.

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