JP2005301917A - Toll collection system and passage ticket authentication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology for preventing wrong use of a bar-code passage ticket. <P>SOLUTION: An entrance terminal 2 includes an entrance lane controller 4 which selects an effective passage ticket ID to be described in a bar-code passage ticket 11 from effective passage ticket IDs described in an entrance-side effective ID table 12 and generates entrance information including the selected effective passage ticket ID, and a printer 5 which issues the bar-code passage ticket 11 by printing the entrance information as a bar code. An exit terminal 3 includes a bar code reader 6 which reads the effective passage ticket ID described in the bar-code passage ticket 11 and an exit lane controller 7 which determines whether the bar-code passage ticket 11 is authentic or not by using the effective passage ticket ID read by the bar code reader 6 and effective passage ticket IDs described in an exit-side effective ID table 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a toll collection system and a pass ticket authentication method used therein, and more particularly, a technique for authenticating a bar code pass ticket, that is, determining whether or not a bar code pass ticket is genuine. About.

  Toll road toll collection is most typically done using magnetic tolls. Toll collection using a magnetic ticket is usually carried out according to the following procedure. At the entrance toll gate, the entrance information including the toll gate ID, receipt ID, issue date and other information is recorded on the magnetic tape of the magnetic toll ticket, and the magnetic toll ticket on which the entrance information is recorded is delivered to the driver using the toll road. It is. At the exit toll booth, it is required to submit the magnetic toll ticket handed over at the entrance toll booth. At the exit toll gate, the section in which the user has traveled is specified from the entrance information recorded on the magnetic ticket, and the toll is calculated.

  One of the challenges in collecting tolls using magnetic tickets is cost reduction. In order to collect tolls using magnetic tickets, special equipment for processing magnetic tickets is required. For example, an entrance toll gate requires a pass ticket issuing machine for issuing magnetic pass tickets, and an exit toll gate requires a pass ticket confirmation machine for reading magnetic pass tickets. Since these dedicated facilities are not used for general purposes, there is a limit to the cost reduction. In terms of the need for dedicated equipment, the collection of tolls using magnetic tolls is not advantageous from a cost standpoint.

  One of the technologies to solve this problem is the use of bar code pass tickets. Patent Document 1 discloses a toll collection system using a bar code ticket. In the toll collection system, a thermal printer for printing a barcode toll ticket is provided at an entrance toll gate. A barcode representing entrance information is printed on the pass ticket by the thermal printer. A bar code reader is provided at the exit toll gate, and the bar code reader is used to read the entrance information described as a bar code on the pass ticket. The section in which the user has traveled is identified from the read entrance information, and the toll is calculated. Since both thermal printers and bar code readers can be used on the market for general purposes, the toll collection system using a bar code pass ticket is advantageous in terms of cost.

It is important to prevent counterfeits, alterations, and other frauds with bar code tickets, just like magnetic tickets. However, since bar code tickets cannot record additional information, they require fraud prevention technology that is different from magnetic tickets. For this reason, provision of a technique for preventing unauthorized use of a barcode pass ticket is required.
JP 2001-118093 A

  An object of the present invention is to provide a technique for preventing unauthorized use of a bar code pass ticket.

  In order to achieve the above object, the present invention employs the following means. In order to clarify the correspondence between the description of [Claims] and the description of [Best Mode for Carrying Out the Invention], the technical matters included in the means include [for carrying out the invention]. The number / symbol used in the best form] is added. However, the added numbers and symbols shall not be used for the interpretation of the technical scope of the invention described in [Claims].

  The toll collection system (10) according to the present invention includes an entrance terminal (2) provided at the entrance toll gate and an exit terminal (3) provided at the exit toll gate. The entrance terminal (2) receives the entrance side valid ID table (12) in which the valid pass ticket ID is described, and from among the valid pass ticket IDs described in the entrance side valid ID table (12), a bar code pass ticket ( 11) Select the valid pass ticket ID to be described in 11) and generate the entrance information including the selected valid pass ticket ID, and print the entrance information as a barcode. And a printing device (5) for issuing a code passing ticket (11). The exit terminal (3) has a bar code reader (6) for reading the valid pass ticket ID described in the bar code pass ticket (11), and an exit side valid ID table having the same contents as the entrance side valid ID table (12). Using the valid pass ticket ID read by the bar code reader (6) and the valid pass ticket ID described in the exit side valid ID table (13), the bar code pass ticket (11) And a second arithmetic unit (7) for determining whether or not is genuine. The entrance side valid ID table (12) and the exit side valid ID table (13) are updated sequentially.

  In the toll system (10), the valid pass ticket ID is described in the bar code pass ticket (11) when the ticket is issued, and the bar code pass ticket (11) is authenticated using the valid pass ticket ID. Such an authentication method is a method suitable for the barcode pass ticket (11) in which information cannot be additionally recorded. In addition, since the effective toll ticket ID used in the toll system (10) is selected from the entrance-side effective ID table (12) that is updated sequentially, the confidentiality is high. Unless the contents of the entrance side valid ID table (12) and the exit side valid ID table (13) currently used are leaked, the bar code pass ticket (11) cannot be forged. Therefore, the toll system (10) can effectively suppress the illegality of the barcode pass ticket (11).

  In one embodiment, the second arithmetic unit (7), when the valid pass ticket ID described in the barcode pass ticket (11) is described in the latest exit side valid ID table (13), It is determined that the pass ticket (11) is genuine, and if not, it is determined that the bar code pass ticket (11) is fraudulent.

  In a preferred embodiment, the second arithmetic unit (7) has the latest m valid pass ticket IDs described in the bar code pass ticket (11) (m is an integer equal to or greater than 2). If it is described in the table (13), it is determined that the barcode pass ticket (11) is genuine, and if not, it is determined that the barcode pass ticket (11) is invalid. In this configuration, after the barcode pass ticket (11) is issued, the entrance side valid ID table (12) and the exit side valid ID table (13) are updated before being read by the exit terminal (3). , The barcode pass ticket (11) can be correctly authenticated.

  In order to further suppress unauthorized use of the barcode pass ticket (11), each of the valid pass ticket IDs described in the entrance side valid ID table (12) is assigned once to the barcode pass ticket (11). It is preferred that only be described.

  The toll system (10) further generates an entrance-side valid ID table (12) and an exit-side valid ID table (13). The entrance-side valid ID table (12) and the exit-side valid ID table (13) Are preferably provided with a server (1) for transmitting the information to the entrance terminal (2) and the exit terminal (3).

  In order to detect the unauthorized use of the barcode pass ticket (11) more surely, the toll collection system (10) includes the entrance information described in the barcode pass ticket (11) by the entrance terminal (2). It is preferable that the exit terminal (3) is compared with the entrance information read from the barcode pass ticket (11). In this case, the entrance terminal (2) generates an issued pass ticket table (14) listing the entrance information described in the bar code pass ticket (11), and the exit terminal (3) A processed passport table (15) in which the entrance information read from (11) is listed is generated. The toll system (10) is provided with a server (1), and the server (1) has an effective toll ticket ID described in the issued toll ticket table (14) and the processed toll ticket table (15). Is used to detect fraud in the barcode pass ticket (11). Specifically, when the specific valid pass ticket ID described in the processed pass ticket table (15) is not described in the issued pass ticket table (14), the server (1) sets the specific valid pass ticket ID. It is determined that the corresponding barcode pass ticket (11) is not genuine.

The pass ticket authentication method according to the present invention includes:
Supplying an entrance side valid ID table (12) and an exit side valid ID table (13) having the same contents to the entrance terminal (2) and the exit terminal (3), respectively;
The entrance terminal (2) selects the valid pass ticket ID to be described in the barcode pass ticket (11) from the valid pass ticket IDs described in the entrance side valid ID table (12), and the selected valid pass Issuing the barcode pass ticket (11) by printing the entrance information including the ticket ID as a barcode;
A step of reading an effective pass ticket ID described in the barcode pass ticket (11) by the exit terminal (3);
The bar code pass ticket (11) is authentic using the valid pass ticket ID read by the exit terminal (3) and the valid pass ticket ID described in the exit side valid ID table (13). Determining whether or not,
A step of updating the entrance side valid ID table (12) and the exit side valid ID table (13).

  According to the present invention, unauthorized use of a barcode pass ticket is effectively prevented.

  FIG. 1 is a block diagram showing a toll collection system 10 according to an embodiment of the present invention. The toll collection system 10 includes a central server 1, an entrance terminal 2 provided at an entrance toll gate, and an exit terminal 3 provided at an exit toll gate.

  The central server 1 is a computer that performs various data processing regarding toll collection work. The central server 1 is connected to the entrance terminal 2 and the exit terminal 3 via a communication line.

  The entrance terminal 2 is a device used to issue the barcode pass ticket 11 at the entrance toll gate, and includes an entrance lane control device 4 and a printer 5. The entrance lane control device 4 is a computing device that determines the content of entrance information to be written on the barcode pass ticket 11. The printer 5 is used to print a barcode corresponding to the entrance information on the barcode pass ticket 11. When thermal paper is used for the bar code pass ticket 11, a thermal printer is used as the printer 5. The use of thermal paper for the bar code pass ticket 11 is suitable for reducing the cost of collecting the toll.

  The exit terminal 3 is a device used to receive a toll at the exit toll booth, and includes a bar code reader 6 and an exit lane control device 7. The barcode reader 6 is used to read entrance information described as a barcode on the barcode pass ticket 11. The exit lane control device 7 is a computing device that calculates a toll using the read entrance information.

  One feature of the toll collection system 10 of the present embodiment is that a valid toll ticket ID is described in the barcode toll ticket 11 as part of the entrance information, and the barcode toll ticket 11 is used by using the valid toll ticket ID. It is to authenticate, that is, to determine whether or not the barcode pass ticket 11 is genuine. Authentication of the barcode pass ticket 11 using the valid pass ticket ID and receipt of the toll using the barcode pass ticket 11 are performed in the following procedure.

  The central server 1 generates valid ID tables 12 and 13 in which valid pass ticket IDs that are candidates described in the barcode pass ticket 11 are described, and supplies them to the entrance terminal 2 and the exit terminal 3, respectively. The contents of the valid ID tables 12 and 13 are the same, that is, the valid passport IDs described in the valid ID tables 12 and 13 are the same. The effective ID table 12 supplied to the entrance terminal 2 is stored in the storage device of the entrance lane control device 4, and the effective ID table 13 supplied to the exit terminal 3 is stored in the storage device of the exit lane control device 7. .

  At the entrance toll gate, a bar code pass ticket 11 in which entrance information including a valid pass ticket ID is described is issued. Specifically, when the driver 8 arrives at the entrance toll gate, the toll person performs a predetermined operation on the entrance terminal 2. When a predetermined operation is performed on the entrance terminal 2, the entrance lane control device 4 selects one valid pass ticket ID from a plurality of valid pass ticket IDs described in the valid ID table 12, and selects the selected valid pass ticket ID. The entrance information including the pass ticket ID is generated. The entrance information includes the toll gate ID of the entrance toll gate, the tollee ID of the toll collector engaged in the issuance of the barcode pass ticket 11, and the date and time of issue of the barcode pass ticket 11 in addition to the valid toll ticket ID. When the entrance information is generated, the printer 5 issues a barcode pass ticket 11 by printing a barcode corresponding to the entrance information on a predetermined sheet.

  At the exit toll gate, it is determined whether or not the bar code pass ticket 11 is genuine using the valid pass ticket ID described in the bar code pass ticket 11. The toll is collected using the pass ticket 11. Specifically, when the driver 8 arrives at the exit toll gate, the toll collector collects the barcode pass ticket 11 from the driver 8 and brings the barcode reader 6 closer to the barcode pass ticket 11. When recognizing the approach of the bar code pass ticket 11, the bar code reader 6 reads the entrance information described as the bar code on the bar code pass ticket 11. The exit lane control device 7 receives the entrance information read by the barcode reader 6, and authenticates the barcode pass ticket 11 using the valid pass ticket ID included in the entrance information. The exit lane control device 7 determines that the barcode passing ticket 11 is legitimate when the valid ticket ID described in the barcode ticket 11 is described in the valid ID table 13. To do. It should be noted that the contents of the valid ID table 12 used for issuing the barcode pass ticket 11 and the valid ID table 13 used for authenticating the barcode pass ticket 11 are the same. On the other hand, when the valid ticket ID is not described in the barcode ticket 11 and when the valid ticket ID described in the barcode ticket 11 is not found in the valid ID table 13, the barcode is displayed. It is determined that the pass ticket 11 is not genuine. When it is determined that the bar code pass ticket 11 is not genuine, the exit lane control device 7 displays that fact on a display device (not shown).

  The effective ID tables 12 and 13 stored in the entrance terminal 2 and the exit terminal 3 are typically updated every day at an appropriate timing. When the time to update the valid ID tables 12 and 13 arrives, the central server 1 supplies new valid ID tables 12 and 13 to the entrance terminal 2 and the exit terminal 3. Thereafter, the entrance terminal 2 and the exit terminal 3 use the newly received valid ID tables 12 and 13 to issue the barcode pass ticket 11 and authenticate the barcode pass ticket 11.

  The effectiveness of such a method is that the barcode pass ticket 11 cannot be forged unless the contents of the valid ID tables 12 and 13 currently stored in the entrance terminal 2 and the exit terminal 3 are stolen. . Since the valid ID tables 12 and 13 are updated at an appropriate timing, it is difficult for a third party to grasp the contents. In addition, even if the contents of the valid ID tables 12 and 13 are stolen at a certain point, after the valid ID tables 12 and 13 are updated, the stolen contents cannot be used to forge the barcode pass ticket 11. Can not. For this reason, if the frequency of updating the valid ID tables 12 and 13 is appropriately determined, forgery of the barcode pass ticket 11 can be substantially suppressed.

  In order to detect unauthorized use of the barcode pass ticket 11 more reliably, the central server 1 stores the entrance information read from the barcode pass ticket 11 by the exit terminal 3 and the entrance terminal 2 stores the barcode pass ticket 11. It is preferable to perform processing in contrast with the entry information to be written.

  Specifically, the entrance information is compared in the following procedure. The entrance lane controller 4 of the entrance terminal 2 sequentially writes the entrance information described in the barcode pass ticket 11 into the issued pass ticket table 14 and stores it. Similarly, the exit lane controller 7 of the exit terminal 3 sequentially writes and stores the entrance information read from the barcode pass ticket 11 in the processed pass ticket table 15. The entrance lane control device 4 and the exit lane control device 7 respectively supply the issued pass ticket table 14 and the processed pass ticket table 15 to the central server 1 at a predetermined timing.

  The central server 1 checks whether the same entrance information described in the processed pass ticket table 15 is described in the issued pass ticket table 14. In this process, it is checked whether or not the same valid ticket ID as the valid ticket ID of the entrance information of the processed ticket table 15 is described in the issued ticket table 14 as the valid ticket ID of the entrance information. . When the same entrance information as the entrance information of the processed pass ticket table 15 is not described in the issued pass ticket table 14, in particular, the valid pass ticket ID of the entrance information of the processed pass ticket table 15 is the issued pass ticket. If it is not described as the entry information of the table 14, it is determined that the use of the bar code pass ticket 11 corresponding to the valid pass ticket ID not described is illegal.

  The inclusion of a valid pass ticket ID in the entrance information is important in order to further ensure the discovery of unauthorized use of the barcode pass ticket 11 by comparing the entrance information. The fact that entrance information including a valid valid pass ticket ID is described in the forged barcode pass ticket 11 means that the contents of the valid ID tables 12 and 13 that are actually stored at the entrance terminal 2 and the exit terminal 3 are not stolen. Hard to occur as long as possible. Therefore, the inclusion of a valid ticket ID in the entrance information further ensures that unauthorized use is detected by comparing the entrance information.

  In order to further suppress the fraud of the barcode pass ticket 11, the entrance terminal 2 uses the barcode of each valid pass ticket ID described in the valid ID table 12 until the valid ID table 12 is updated. It is preferable to use it only once for issuing the pass ticket 11. For example, it is preferable that a series of valid pass ticket IDs described in the valid ID table 12 is used in order each time the barcode pass ticket 11 is issued. That is, after the valid ID table 12 is updated, the first barcode pass ticket 11 is issued using the valid pass ticket ID described at the top of the valid ID table 12, and the second barcode pass ticket 11 is issued. The valid pass ticket ID described in the second of the valid ID table 12 is used. The same applies to the subsequent issuance of the barcode pass ticket 11.

  In this case, every time the exit lane control device 7 of the exit terminal 3 reads the barcode pass ticket 11, the exit lane control device 7 can record in the valid ID table 13 that each valid pass ticket ID described therein is used once. Is preferred. When the valid pass ticket ID described in the bar code pass ticket 11 read by the bar code reader 6 is a valid pass ticket ID already used once, the exit terminal 3 determines that the bar code pass ticket 11 Is not legitimate, and a message to that effect is displayed. Thereby, even if the valid pass ticket ID is stolen from the barcode of the issued bar code pass ticket 11 and the valid pass ticket ID is described in the bar code pass ticket 11 again, the bar code pass ticket 11 Unauthorized use can be detected.

  In order to effectively suppress fraud, the valid ID tables 12 and 13 are preferably updated frequently. However, frequent updating of the valid ID tables 12 and 13 may make the following problems serious. Since toll roads are usually open 24 hours a day, frequent updating of the valid ID tables 12 and 13 means that after a bar code pass ticket 11 is issued at a toll gate for a driver 8, the driver 8 There is a possibility that the valid ID tables 12 and 13 are frequently updated before arriving at the exit toll gate. When such a situation occurs, the content of the valid ID table 12 used at the entrance terminal 2 for issuing the bar code pass ticket 11 and the use at the exit terminal 3 for checking whether the bar code pass ticket 11 is fraudulent or not. The contents of the effective ID table 13 are different. This leads to erroneous determination that the bar code pass ticket 11 is not legitimate even though the bar code pass ticket 11 is legitimate.

  In order to deal with such a problem, the exit terminal 3 does not use the latest effective ID table 13 (rather than using only the latest effective ID table 13). It is preferable to use it for authentication of the ticket 11. In this case, the latest m (where m is an integer of 2 or more) valid ID tables 13 are stored in the exit lane control device 7 of the exit terminal 3. The exit lane controller 7 determines that if the valid pass ID described in the bar code pass ticket 11 is described in any of the m valid ID tables 13, the bar code pass ticket 11 is Judge that it is.

  The number m of the valid ID tables 13 stored in the exit lane control device 7 is adjusted according to the update frequency of the valid ID tables 12 and 13. If the valid ID tables 12 and 13 are updated frequently, m is increased. When the effective ID tables 12 and 13 are updated less frequently, m is decreased. If the effective ID tables 12 and 13 are updated once a day, it is usually sufficient that m is 2.

FIG. 2 is a diagram showing the operation of the toll collection system 10 in a preferred embodiment in which the latest m valid ID tables 13 are used for authenticating the barcode toll ticket 11 at the exit terminal 3. In the embodiment of FIG. 2, m is 2; that is, the latest two valid ID tables 13 are stored in the exit lane controller 7. In FIG. 2 and the following description, a suffix is added to the reference numeral to indicate the version of the valid ID tables 12 and 13. The valid ID table 12 _i is the i-th version of the valid ID table 12, and the valid ID table 13 _i is the i-th version of the valid ID table 13. Note that the version of the valid ID tables 12 _i and 13 _i is newer as i is larger, and the valid ID tables 12 and 13 of the same version have the same contents. The i-th version effective ID table 12 _i supplied to the entrance terminal 2 has the same contents as the i-th version effective ID table 13 _i supplied to the exit terminal 3. Updating the effective ID table to the i-th version means that the effective ID tables 12 _i and 13 _i are supplied to the entrance terminal 2 and the exit terminal 3, respectively.

Initially, the inlet traffic lane controller 4 first version of the valid ID table 12 ₁ is stored in, the outlet traffic lane controller 7, the zeroth version, valid ID table ₁₃ 0 of the first version, 13 ₁ is stored Suppose that

When a predetermined time is reached, the central server 1 supplies a valid ID table 12 ₂ of the second version the inlet traffic lane controller 4 supplies a valid ID table 13 ₂ of the second version of the exit lane controller 7 (Step S01). Inlet traffic lane controller 4 deletes the valid ID table 12 ₁ of the first version from the storage device, instead, it holds a valid ID table 12 ₂ of the second version in the storage device. Thereafter, the inlet terminal 2 performs a ticketing barcode ticket 11 using a valid ID table 12 _2. On the other hand, the outlet traffic lane controller 7 deletes the valid ID table 13 ₀ of the 0th version from the storage device holds a valid ID table 13 ₂ of the second version in the storage device; previous version (first version valid ID table 13 ₁₎ are not deleted. Thereafter, the exit terminal 3 issues the barcode pass ticket 11 using the latest two valid ID tables 13 ₁ and 13 ₂ .

The driver 8 after the update of the effective ID table reaches the entrance tollgate, the entrance terminal 2, with an effective ticket ID described enabled ID table 12 _2, performs ticketing barcode ticket 11 ( Step S02). The barcode ticket 11 would one active ticket ID described enabled ID table 12 ₂ of the second version is described.

Before the driver 8 arrives at the exit toll gate, when it is time to update the valid ID table is performed, the central server 1 supplies a valid ID table 12 of the _third version the inlet traffic lane controller 4, the 3 supplies versions of the valid ID table 13 ₃ to the exit lane controller 7 (step S03). Exit lane controller 7 deletes the valid ID table 13 ₁ of the first version from the storage device holds a valid ID table 13 of the _third version in the storage device; previous version (second version) valid ID table 13 ₂ is not deleted.

Thereafter, when the driver 8 arrives at the exit toll gate, the entrance information of the barcode pass ticket 11 is read by the barcode reader 6 (step S04). Exit lane controller 7, valid ticket ID of the read entrance information determines whether or described in any of the two most recent valid ID table 13 _2, 13 _3. In this embodiment, one valid ticket ID of the valid ticket ID described enabled ID table 12 ₂ the barcode ticket 11 is described. Thus, the exit lane controller 7, valid ticket ID of the read entrance information is written within the valid ID table 13 _2, therefore, the barcode ticket 11 is determined to be legitimate.

  As described above, in the embodiment shown in FIG. 2, after the barcode pass ticket 11 is issued at the entrance toll booth for a certain driver 8, the valid ID tables 12, 13 before the driver 8 arrives at the exit toll booth. Even if is updated, the barcode pass ticket 11 can be correctly authenticated.

  In the above-described embodiment, the supply of the valid ID tables 12 and 13 from the central server 1 to the entrance terminal 2 and the exit terminal 3 can be performed by manually transporting a recording medium instead of a communication line. It is. Typically, a flexible disk can be used as the recording medium. Such a configuration is suitable for a toll road with a small amount of traffic, that is, a toll road that does not require a large number of valid pass ticket IDs in the valid ID tables 12 and 13.

  Similarly, supply of the issued pass ticket table 14 and the processed pass ticket table 15 from the entrance terminal 2 and the exit terminal 3 to the central server 1 is performed by manually transporting a recording medium such as a flexible disk. Is possible.

FIG. 1 is a block diagram showing a configuration of a toll collection system according to an embodiment of the present invention. FIG. 2 is a diagram illustrating the operation of the toll collection system in the preferred embodiment.

Explanation of symbols

1: Central server 2: Entrance terminal 3: Exit terminal 4: Entrance lane control device 5: Printer 6: Bar code reader 7: Exit lane control device 8: Driver 10: Toll collection system 11: Bar code pass ticket 12, 13 : Valid ID table 14: Issued pass ticket table 15: Processed pass ticket table

Claims (8)

An entrance terminal at the entrance toll gate;
An exit terminal provided at the exit toll gate,
The entrance terminal is
Receive the entrance valid ID table in which the valid pass ticket ID is described, and select and select the valid pass ticket ID to be described in the barcode pass ticket from the valid pass ticket IDs of the entrance valid ID table A first arithmetic unit for generating entrance information including the valid ticket ID,
A printing device that issues a barcode pass ticket by printing the entrance information as a barcode,
The exit terminal is
A barcode reader for reading the valid ticket ID described in the barcode ticket;
The exit side valid ID table having the same content as the entrance side valid ID table is received, and the valid pass ticket ID read by the bar code reader and the valid pass ticket ID described in the exit side valid ID table are And a second arithmetic unit that determines whether or not the barcode pass ticket is genuine,
The entrance side valid ID table and the exit side valid ID table are updated sequentially. The toll collection system according to claim 1,
The second arithmetic unit determines that the barcode pass ticket is genuine when the valid pass ticket ID described in the barcode pass ticket is described in the latest exit side valid ID table. If this is not the case, a toll collection system that determines that the bar code ticket is fraudulent. The toll collection system according to claim 1,
The second arithmetic unit, when the valid pass ticket ID described in the barcode pass ticket is described in the latest n (n is an integer of 2 or more) exit side valid ID table, A toll collection system that determines that the bar code toll is legitimate. The toll collection system according to claim 1,
The toll collection system in which each of the valid ticket IDs described in the entrance-side valid ID table is described only once in the barcode ticket. The toll collection system according to claim 1,
In addition,
A server for generating the entrance side valid ID table and the exit side valid ID table, and transmitting the created entrance side valid ID table and the exit side valid ID table to the entrance terminal and the exit terminal, respectively; Toll collection system. The toll collection system according to claim 1,
In addition,
With a server,
The entrance terminal generates an issued pass ticket table listing the entrance information described in the barcode pass ticket,
The exit terminal generates a processed pass ticket table in which the entrance information read from the barcode pass ticket is listed,
The server uses the valid ticket ID included in the entrance information described in the issued ticket table and the processed ticket table to detect fraud of the barcode ticket. . The toll collection system according to claim 6,
The server, when the specific valid pass ticket ID described in the processed pass ticket table is not described in the issued pass ticket table, the bar code pass ticket corresponding to the specific valid pass ticket ID is valid. Toll collection system that determines that it is not. Supplying an entrance side valid ID table and an exit side valid ID table having the same contents to the entrance terminal and the exit terminal, respectively;
The entrance terminal selects the valid pass ticket ID to be described in the barcode pass ticket from the valid pass ticket IDs described in the entrance side valid ID table, and the entrance information including the selected valid pass ticket ID Issuing a barcode pass ticket by printing the as a barcode;
The exit terminal reads the valid pass ticket ID described in the bar code pass ticket;
The exit terminal uses the read valid pass ticket ID and the valid pass ticket ID described in the exit side valid ID table to determine whether the bar code pass ticket is genuine or not. A step of judging,
A pass ticket authentication method comprising: updating the entrance side valid ID table and the exit side valid ID table.

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