JP5289594B2 - Warning system - Google Patents

Description

  The present invention relates to a technique for safely delivering articles.

Patent Document 1 describes a method of storing and delivering an article to be delivered in a storage means. In this method, the storage means issues a warning when the reception intensity of the radio wave emitted by the communication means becomes below a certain value and the state continues for a specified time or longer.
It is also described that the communication means is carried by a person who carries the storage means, and that the communication means is previously installed in the movement route. Therefore, a warning is issued when the moving storage means is separated from the person carrying the moving storage means or when the moving storage means is separated from the movement route.

Japanese Patent Laid-Open No. 1-213796 Japanese Patent Laid-Open No. 9-259368 JP 2009-4971 A

However, according to the method described in Patent Document 1, if an article is stolen, the article cannot be found.
An object of this invention is to specify the position of an article when the article is stolen.

The warning system according to the present invention is:
A warning system comprising a plurality of warning devices and a management device;
Each warning device of the plurality of warning devices is:
An antenna that emits radio waves within a predetermined range;
A reading unit that reads out identification information of the tag from a tag attached to an article via a radio wave radiated from the antenna;
A warning unit that transmits a warning including identification information read by the reading unit to the management device via a communication device in a predetermined case;
The management device
A management device receiving unit that receives the warning transmitted by the warning unit via a communication device;
When the receiving unit receives a warning, a management device transmitting unit that transmits identification information included in the warning to the plurality of warning devices via a communication device,
Each warning device further includes:
An identification information receiving unit that receives the identification information transmitted by the management device transmitting unit via a communication device;
When the identification information received by the identification information receiving unit is received from a tag, a detection information transmission unit is provided that transmits tag detection information to the management device via a communication device.

The detection information transmitting unit transmits tag detection information including position information indicating a position at which the identification information received by the identification information receiving unit is received from a tag to the management device.

The reading unit reads the first encrypted data and the identification information from a tag storing the first encrypted data in which the tag data is encrypted with the first encryption key and the tag identification information,
Each warning device further includes:
A storage device storing a first decryption key for decrypting data encrypted with the first encryption key and determination data;
A decryption unit for decrypting the first encrypted data read by the read unit with a first decryption key stored in the storage device and generating first decrypted data by a processing device;
A determination unit that determines by a processing device whether or not the first decoded data generated by the decoding unit matches the determination data;
When the determination unit determines that the first decrypted data does not match the determination data, or when the reading unit cannot read the encrypted data from the tag, the warning unit outputs the warning It transmits to a management apparatus, It is characterized by the above-mentioned.

  When the article is stolen, the warning device according to the present invention transmits the identification information of the tag attached to the article to the other warning device, and the other warning device receiving the identification information tags the received identification information. When it is received from, it is notified. Thereby, it becomes possible to specify the position of the stolen article.

The figure for demonstrating the outline | summary of the warning system which concerns on Embodiment 1. FIG. FIG. 3 is a functional block diagram illustrating functions of a warning system according to the first embodiment. The figure for demonstrating the outline | summary of the warning system which concerns on Embodiment 2. FIG. FIG. 4 is a functional block diagram illustrating functions of a warning system according to a second embodiment. The figure for demonstrating the outline | summary of the warning system which concerns on Embodiment 3. FIG. FIG. 9 is a functional block diagram illustrating functions of a warning system according to Embodiment 3. FIG. 6 is a functional block diagram showing functions of a warning system according to a fourth embodiment. The figure for demonstrating the outline | summary of the warning system which concerns on Embodiment 5. FIG. FIG. 10 is a functional block diagram illustrating functions of a warning system according to a fifth embodiment. The figure which shows an example of the hardware constitutions of the warning apparatus 4 and the management apparatus 6. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the following description, the processing device is a CPU 911 or the like which will be described later. The storage device is a ROM 913, a RAM 914, a magnetic disk 920, a cache memory, a register, or the like included in the CPU 911, which will be described later. Input devices are a keyboard 902, a communication board 915, and the like which will be described later. The communication device is a communication board 915 described later. That is, the processing device, the storage device, the input device, and the communication device are hardware.

Embodiment 1 FIG.
In the first embodiment, a basic configuration of a warning system will be described.

FIG. 1 is a diagram for explaining the outline of the warning system according to the first embodiment.
I want to deliver the article 1 safely from the point A where the requester is located to the point B as the delivery destination. The safe delivery means that the goods 1 are surely delivered without being stolen.
In this case, for example, the article 1 is placed on a vehicle 3 such as a shipping company and delivered from point A to point B. When the article 1 is placed on the vehicle 3, the tag 2 is attached to the article 1. In addition, a warning device 4 including an antenna 5 is attached to the vehicle 3. The antenna 5 radiates a radio wave 7 toward at least the entire loading platform of the vehicle 3. The warning device 4 reads data from the tag 2 via the radio wave 7 radiated from the antenna 5. The warning device 4 transmits a warning to the management device 6 when the data cannot be read from the tag 2. The warning device 4 also transmits a warning to the management device 6 even when correct data cannot be read from the tag 2. When receiving the warning, the management device 6 notifies the request source and the delivery destination that the theft has occurred.

FIG. 2 is a functional block diagram illustrating functions of the warning system according to the first embodiment.
The warning system includes a tag 2, a warning device 4, and a management device 6.

  The tag 2 stores encrypted data obtained by encrypting tag data with an encryption key. The tag 2 returns the stored encrypted data as a reflected wave when receiving the predetermined radio wave 7. The tag data is, for example, identification information of the tag 2 assigned uniquely for each tag 2. The encryption key is a public key of the warning device 4.

The warning device 4 includes an antenna 5. The warning device 4 includes a reading unit 11, a decryption unit 12, a determination unit 13, a warning unit 14, and a decryption key storage device 15.
The decryption key storage device 15 stores a decryption key for decrypting the encrypted data stored in the tag 2 and determination data. Here, the decryption key is a secret key of the warning device 4. The determination data is the same data as the tag data, that is, identification information of the tag 2.
The reading unit 11 reads the encrypted data via the radio wave 7 radiated from the tag 2 by the antenna 5 at a predetermined interval. The decryption unit 12 decrypts the encrypted data read by the reading unit 11 with the decryption key stored in the decryption key storage device 15 and generates decrypted data by the processing device. The determination unit 13 determines whether or not the decrypted data generated by the decryption unit 12 matches the determination data stored in the decryption key storage device 15. The warning unit 14 transmits a warning to the management device 6 when the reading unit 11 cannot read the encrypted data from the tag 2 or when the determination unit 13 determines that the decrypted data does not match the determination data.
For example, the warning includes identification information (tag data) of the tag 2 and position information of the vehicle 3 to which the warning device 4 is attached. The position information of the vehicle 3 may be acquired from a navigation system attached to the vehicle 3, or may be acquired by attaching a GPS antenna to the warning device 4.
When the reading unit 11 cannot read the encrypted data from the tag 2, the warning unit 14 does not immediately send a warning, but the reading unit 11 can read the encrypted data from the tag 2 for a predetermined period. An alarm may be transmitted when the absence continues.

  When the vehicle 3 carries a plurality of articles 1, the decryption key storage device 15 stores the tag data of the tag 2 attached to each article 1 in advance as determination data. The reading unit 11 reads the encrypted data from the tag 2 attached to each article 1, and the decrypting unit 12 decrypts each encrypted data to generate decrypted data. The determination unit 13 compares each decoded data with each determination data. Then, when there is determination data that does not have matching decrypted data, the warning unit 14 determines that the encrypted data cannot be read from the tag 2 indicated by the determination data, or the decrypted data does not match the determination data. Send a warning.

The management device 6 includes a management device reception unit 21 and a management device transmission unit 22.
The management device receiving unit 21 receives the warning transmitted by the warning unit 14 via the communication device. When the management device receiving unit 21 receives the warning, the management device transmission unit 22 identifies which item 1 has been stolen from the identification information of the tag 2 included in the received warning, and sends the request to the requester of the item 1 Notify that the article 1 has been stolen. For example, by sending an e-mail to a pre-registered request source or delivery destination e-mail address, the fact that the article 1 has been stolen is notified. In addition, the security company and the police are notified of the fact that the article 1 has been stolen and the position information of the vehicle 3 when it has been stolen.

That is, in the warning system according to the first embodiment, a warning is transmitted from the warning device 4 to the management device 6 in the following cases (1) and (2).
(1) When the tag 2 moves outside the range where the antenna 5 radiates the radio wave 7, the reading unit 11 cannot read the encrypted data from the tag 2, so the warning unit 14 issues a warning to the management device 6 Send to. Therefore, when a thief takes away the article 1 to which the tag 2 is attached, a warning is transmitted.
(2) When correct tag data cannot be obtained from the encrypted data read by the reading unit 11, the warning unit 14 transmits a warning to the management device 6. Therefore, even when a thief takes away the article 1, even if a mimic device that returns a reflected wave to the radio wave 7 radiated by the antenna 5 is attached to the vehicle 3 in the same manner as the tag 2, the imitation device is attached to the tag 2. A warning is sent unless the encrypted data stored in is imitated.
Here, the encrypted data is data obtained by encrypting different tag data for each tag 2. Therefore, unless the data is copied from the tag 2 attached to the article 1, the encrypted data stored in the tag 2 cannot be imitated.
Therefore, it is difficult to steal the article 1 without sending a warning. Therefore, it leads to prevention of the theft of the article 1.

  The article 1 may be locked with the recipient's public key at point B of the delivery destination, and may be unlocked only with the recipient's private key. When the article 1 is electronic data, the electronic data may be encrypted with the recipient's public key and can be decrypted only with the recipient's private key.

Embodiment 2. FIG.
In general, when a distribution company performs delivery, articles 1 collected by a vehicle 3 from a request source are once collected in a distribution center, and the articles 1 are transferred to the vehicles 3 assigned to each delivery destination area and delivered to a delivery destination. . In particular, the shipping company that transports the article 1 to the distribution center may be different from the shipping company that transports the article 1 from the distribution center to the delivery destination.
As described above, in general, the article 1 is not delivered directly to the delivery destination by one vehicle 3, but the article 1 is relayed at a relay point and transferred to another vehicle 3 for delivery. There are many. In the second embodiment, a case where the article 1 is relayed and delivered at a relay point will be described.

FIG. 3 is a diagram for explaining the outline of the warning system according to the second embodiment.
As in the case of the first embodiment, it is desired to safely deliver the article 1 from the point A where the requester is located to the point B as the delivery destination. Here, the vehicle 3A carries the article 1 from the A point to the C relay station, and the vehicle 3B carries the article 1 from the C relay station to the B point. A warning device 4A is attached to the vehicle 3A, and an antenna 5A is attached to the warning device 4A. Similarly, a warning device 4B is attached to the vehicle 3B, and an antenna 5B is attached to the warning device 4B. Then, the warning device 4A and the warning device 4B each transmit a warning to the management device 6 under the same conditions as the warning device 4 described in the first embodiment.
Note that, at the C relay station, the article 1 to which the tag 2 is attached is transferred from the vehicle 3A to the vehicle 3B. At this time, the data stored in the tag 2 is rewritten and necessary information is written in the decryption key storage device 15B of the vehicle 3B.

FIG. 4 is a functional block diagram illustrating functions of the warning system according to the second embodiment.
The warning system includes a tag 2, warning devices 4A and 4B, and a management device 6.

  The tag 2 is attached to the article 1 when placed on the vehicle 3A at the point A. At this time, the tag 2 stores the first encrypted data obtained by encrypting the tag data with the first encryption key. When the tag 2 receives the predetermined radio wave 7, the tag 2 returns the stored first encrypted data as a reflected wave. The first encryption key is a public key of the warning device 4A.

The warning device 4A includes an antenna 5A, a reading unit 11A, a decryption unit 12A, a determination unit 13A, a warning unit 14A, and a decryption key storage device 15A. Further, the warning device 4A includes a tag data update unit 16A and an identification information transmission unit 17A.
The warning device 4B includes an antenna 5B, a reading unit 11B, a decryption unit 12B, a determination unit 13B, a warning unit 14B, and a decryption key storage device 15B. Furthermore, the warning device 4B includes an identification information transmission unit 17B.

The decryption key storage device 15A stores a first decryption key for decrypting the first encrypted data stored in the tag 2 and determination data. Here, the first decryption key is a secret key of the warning device 4A. The determination data is the same data as the tag data, that is, identification information of the tag 2.
The reading unit 11A reads the first encrypted data via the radio wave 7 radiated from the tag 2 by the antenna 5A at a predetermined interval. When the reading unit 11A reads the first encrypted data from the tag 2 for the first time, the identification information transmitting unit 17A transmits the identification information (tag data) of the tag 2 and the identification information of the warning device 4A to the management device 6. . Thereby, the management apparatus 6 understands that the tag 2 was loaded in the vehicle 3A.
The decryption unit 12A decrypts the first encrypted data read by the read unit 11A with the first decryption key stored in the decryption key storage device 15A, and generates decrypted data by the processing device. The determination unit 13A determines whether or not the decrypted data generated by the decryption unit 12A matches the determination data stored in the decryption key storage device 15A. The warning unit 14A transmits a warning to the management device 6 when the reading unit 11A cannot read the first encrypted data from the tag 2 or when the determination unit 13A determines that the decrypted data does not match the determination data. To do.

At the C relay station, as described above, the article 1 is transferred from the vehicle 3A to the vehicle 3B.
At this time, the tag data updating unit 16A deletes the first encrypted data stored in the tag 2 and causes the tag 2 to store the second encrypted data obtained by encrypting the tag data with the second encryption key. Here, the second encryption key is a public key of the warning device 4B.
In addition, the decryption key storage device 15A erases the stored tag data. Thereby, even if the article 1 is transferred from the vehicle 3A to the vehicle 3B, no warning is transmitted from the warning device 4A.

The decryption key storage device 15B stores a second decryption key that is a secret key of the warning device 4A and determination data.
The reading unit 11B reads the second encrypted data via the radio wave 7 radiated from the tag 2 by the antenna 5B at a predetermined interval. When the reading unit 11B reads the second encrypted data from the tag 2 for the first time, the identification information transmission unit 17B transmits the identification information (tag data) of the tag 2 and the identification information of the warning device 4B to the management device 6. . Thereby, the management apparatus 6 understands that the tag 2 was loaded in the vehicle 3B.
The decryption unit 12B decrypts the second encrypted data read by the reading unit 11B with the second decryption key stored in the decryption key storage device 15B, and generates decrypted data by the processing device. The determination unit 13B determines whether or not the decrypted data generated by the decryption unit 12B matches the determination data stored in the decryption key storage device 15B. The warning unit 14B transmits a warning to the management device 6 when the reading unit 11B cannot read the second encrypted data from the tag 2 or when the determination unit 13B determines that the decrypted data does not match the determination data. To do.

The management device 6 includes a management device reception unit 21 and a management device transmission unit 22 as in the first embodiment.
The operation when a warning is received is the same as in the first embodiment.
The management device receiver 21 receives the identification information of the tag 2 and the identification information of the warning device 4 transmitted by the identification information transmitters 17A and 17B. The management device transmission unit 22 identifies the request source and the delivery destination from the identification information of the tag 2 received by the management device reception unit 21, and the position information known from the received identification information of the warning device 4 is the request source and the delivery destination. Send to. Note that the position information known from the identification information of the warning device 4 is, for example, information that the article 1 has arrived at the C relay station if it is the identification information of the warning device 4B.

As described above, when the article 1 is transferred to another vehicle 3, the encrypted data stored in the tag 2 is replaced. As described above, the shipping company that transports the article 1 from the point A to the C relay station may be different from the shipping company that transports the article 1 from the C relay station to the B point. Even in such a case, by replacing the encrypted data, it is not necessary to share the decryption key between the respective transport companies, and the security of the key is maintained. That is, the secret key of each shipping company is not known to other shipping companies, and the security of the secret key is maintained.
When the reading unit 11 reads the encrypted data from the tag 2 for the first time, the identification information of the tag 2 is transmitted to the management device 6. Therefore, the management device 6 can grasp which vehicle 3 the article 1 is loaded on. In particular, the transporter simply loads the article 1 on the vehicle 3, and the identification information of the tag 2 is transmitted to the management device 6 without particularly performing the transmission operation of the identification information of the tag 2 to the management device 6. For example, the identification information of the tag 2 is transmitted to the management device 6 without reading a barcode attached to the article 1 or the like.

Embodiment 3 FIG.
In the second embodiment, the case where the article 1 is relayed and delivered at the relay point has been described. In this way, when the article 1 is relayed and delivered, in particular, the shipping company that has received the request from the requester delivers the article 1 in principle, but entrusts only a part of the section to another shipping company or the like. There is a case. For example, a shipping company that does not have an aircraft may entrust only air transportation to an airline.
In the third embodiment, a case where a partial section is entrusted to another transportation company or the like will be described.

FIG. 5 is a diagram for explaining the outline of the warning system according to the third embodiment.
Similarly to the above, it is desired to safely deliver the article 1 from the point A where the requester is located to the point B as the delivery destination. Here, the vehicle 3A carries the article 1 from the point A to the point C, the aircraft 8 carries the article 1 from the point C to the point D, and the vehicle 3B carries the article 1 from the point D to the point B. In particular, the vehicle 3A and the vehicle 3B are vehicles of the same transportation company, and it is assumed that only the air route portion is entrusted to the airline and transported.
Note that a warning device 4A is attached to the vehicle 3A, and an antenna 5A is attached to the warning device 4A. Similarly, a warning device 4B is attached to the vehicle 3B, and an antenna 5B is attached to the warning device 4B. Similarly, a warning device 4C is attached to the aircraft 8, and an antenna 5C is attached to the warning device 4C. Then, the warning device 4A, the warning device 4B, and the warning device 4C each transmit a warning to the management device 6 under the same conditions as the warning device 4 described in the first embodiment.

FIG. 6 is a functional block diagram illustrating functions of the warning system according to the third embodiment.
The warning system includes a tag 2, warning devices 4A, 4B, 4C, and a management device 6. In FIG. 6, the tag 2 and the management device 6 are omitted.

  The tag 2 is attached to the article 1 when placed on the vehicle 3A at the point A. At this time, the tag 2 stores the first encrypted data obtained by encrypting the tag data with the first encryption key. When the tag 2 receives the predetermined radio wave 7, the tag 2 returns the stored first encrypted data as a reflected wave. The first encryption key is a public key of the warning device 4A.

The warning device 4A includes an antenna 5A, a reading unit 11A, a decryption unit 12A, a determination unit 13A, a warning unit 14A, a decryption key storage device 15A, and a tag data update unit 16A. Further, the warning device 4A includes a decryption key update unit 18A.
The warning devices 4B and 4C include antennas 5B and 5C, reading units 11B and 11C, decryption units 12B and 12C, determination units 13B and 13C, warning units 14B and 14C, and decryption key storage devices 15B and 15C.

The decryption key storage device 15A stores a first decryption key for decrypting the first encrypted data stored in the tag 2 and determination data. Here, the first decryption key is a private key of the shipping company. The determination data is the same data as the tag data, that is, identification information of the tag 2.
The reading unit 11A reads the first encrypted data via the radio wave 7 radiated from the tag 2 by the antenna 5A at a predetermined interval. The decryption unit 12A decrypts the first encrypted data read by the read unit 11A with the first decryption key stored in the decryption key storage device 15A, and generates decrypted data by the processing device. The determination unit 13A determines whether or not the decrypted data generated by the decryption unit 12A matches the determination data stored in the decryption key storage device 15A. The warning unit 14A transmits a warning to the management device 6 when the reading unit 11A cannot read the first encrypted data from the tag 2 or when the determination unit 13A determines that the decrypted data does not match the determination data. To do.

At point C, the article 1 is transferred from the vehicle 3A to the aircraft 8 as described above.
At this time, the decryption key update unit 18A can decrypt only a part of the encrypted data that can be decrypted with the first decryption key in the decryption key storage device 15C of the warning device 4C attached to the aircraft 8. A second decryption key that is a secret key is stored. That is, the decryption key update unit 18A stores the second decryption key, which is a lower key of the first decryption key, in the decryption key storage device 15C.
Further, the tag data update unit 16A deletes the first encrypted data stored in the tag 2 and causes the tag 2 to store the second encrypted data obtained by encrypting the tag data with the second encryption key. Here, the second encryption key is a key for generating data that can be decrypted with the second decryption key, and is a public key corresponding to the second decryption key.
In addition, the decryption key storage device 15A erases the stored tag data. Thereby, even if the article 1 is transferred from the vehicle 3A to the aircraft 8, no warning is transmitted from the warning device 4A.

The decryption key storage device 15C stores the second decryption key stored in the decryption key update unit 18A and the determination data.
The reading unit 11C reads the second encrypted data via the radio wave 7 radiated from the tag 2 by the antenna 5C at a predetermined interval. The decryption unit 12C decrypts the second encrypted data read by the read unit 11C with the second decryption key stored in the decryption key storage device 15C, and generates decrypted data by the processing device. The determination unit 13C determines whether or not the decrypted data generated by the decryption unit 12C matches the determination data stored in the decryption key storage device 15C. The warning unit 14C transmits a warning to the management device 6 when the reading unit 11C cannot read the second encrypted data from the tag 2 or when the determination unit 13C determines that the decrypted data does not match the determination data. To do.

At the point D, as described above, the article 1 is transferred from the aircraft 8 to the vehicle 3B.
At this time, the decryption key storage device 15C erases the stored tag data. Thereby, even if the article 1 is transferred from the aircraft 8 to the vehicle 3B, no warning is transmitted from the warning device 4C.
Note that the data stored in the tag 2 is not changed, and the tag 2 keeps storing the second encrypted data.

The decryption key storage device 15B of the warning device 4B stores the first decryption key and tag data stored in the decryption key storage device 15A of the warning device 4A. That is, as described above, since the vehicle 3A and the vehicle 3B are vehicles of the same transportation company, both the decryption key storage device 15A, the decryption key storage device 15B, and the first decryption key which is the transportation company's private key. Is remembered.
The reading unit 11B reads the second encrypted data via the radio wave 7 radiated from the tag 2 by the antenna 5B at a predetermined interval. The decryption unit 12B decrypts the second encrypted data read by the reading unit 11B with the first decryption key stored in the decryption key storage device 15B, and generates decrypted data by the processing device. The determination unit 13B determines whether or not the decrypted data generated by the decryption unit 12B matches the determination data stored in the decryption key storage device 15B. The warning unit 14B transmits a warning to the management device 6 when the reading unit 11B cannot read the first encrypted data from the tag 2 or when the determination unit 13B determines that the decrypted data does not match the determination data. To do.

  As described above, when a part of transportation is entrusted, when the article 1 is delivered to the entrustee (the aircraft 8 in the above example), the entrusting device (the vehicles 3A and 3B in the above example) Pass the secret key below the secret key. The tag 2 stores encrypted data obtained by encrypting the tag data with a public key corresponding to the lower secret key. Thereby, not only can the subcontractor send a warning in the same manner as the subcontractor, but there is no need to update the data stored in the tag 2 when the article 1 is delivered from the subcontractor to the consignor. That is, the data stored in the tag 2 may be updated only at the time of commissioning.

In the above description, when the article 1 is delivered to the consignee (aircraft 8 in the above example), a secret key lower than the secret key of the consignor (vehicles 3A and 3B in the above example) is passed to the warning device 4 of the consignee. did. That is, when the article 1 is transferred from the vehicle 3A to the aircraft 8 at the point C, the data obtained by encrypting the tag data with the second decryption key is stored in the tag 2 as the second encrypted data.
However, when the article 1 is transferred from the vehicle 3A to the aircraft 8 at the point C, the first encrypted data and the data encrypted with the airline public key may be stored in the tag 2 as the second encrypted data. Good.
In this case, the warning device 4C of the aircraft 8 requires an airline private key and a first decryption key corresponding to the first encryption key used to encrypt the first encrypted data. However, the first decryption key is the private key of the shipping company and cannot simply be given to the airline. Therefore, the decryption key update unit 18A of the warning device 4A may store the decryption key storage device 15C with an expiration date that can be used only during a period in which the article 1 is carried by the aircraft 8, for example. In this case, in the warning device 4C, the decryption data may be generated by first decrypting the second encrypted data read by the reading unit 11C with the second decryption key and then decrypting with the first decryption key. .
When the article 1 is transferred from the aircraft 8 to the vehicle 3B, the decryption key update unit 18C (not shown) of the warning device 4C decrypts the second encrypted data with the second decryption key and generates the first encryption. Data is stored in tag 2. In this case, the warning device 4B can perform processing using the first decryption key, as described above.

Embodiment 4 FIG.
In the above embodiment, the case where the tag 2 stores the encrypted data in advance and the stored encrypted data is returned as the reflected wave of the radio wave 7 has been described. However, in this case, the data transmitted from the tag 2 is the same every time. Therefore, there is a possibility that the data of the tag 2 is copied.
In the fourth embodiment, a method for making it more difficult to copy the data of the tag 2 will be described.

FIG. 7 is a functional block diagram illustrating functions of the warning system according to the fourth embodiment.
The warning system includes a tag 2, a warning device 4, and a management device 6.

The tag 2 includes an encryption key storage device 31 and an encryption unit 32.
The encryption key storage device 31 stores an encryption key that is a public key of the warning device 4. When receiving the radio wave 7 carrying the predetermined data, the encryption unit 32 encrypts the predetermined data with the encryption key stored in the encryption key storage device 31, generates encrypted data, and returns it as a reflected wave.

The warning device 4 includes an antenna 5. The warning device 4 includes a reading unit 11, a decryption unit 12, a determination unit 13, a warning unit 14, and a decryption key storage device 15.
The decryption key storage device 15 stores a decryption key that is a secret key of the warning device 4.
The antenna 5 radiates a radio wave 7 carrying predetermined data at predetermined intervals. The reading unit 11 reads the encrypted data that the tag 2 returns as a reflected wave of the radio wave 7.
Hereinafter, the operations of the decoding unit 12, the determination unit 13, and the warning unit 14 are the same as those in the first embodiment.
Here, the predetermined data transmitted by the antenna 5 on the radio wave 7 is, for example, a random number, and is different data every predetermined time. For this reason, the encrypted data returned by the tag 2 as a reflected wave also becomes different data every predetermined time.

  As described above, in the warning system according to the fourth embodiment, since the data transmitted from the tag 2 is different every predetermined time, it is difficult to copy the data of the tag 2.

When the article 1 is relayed and delivered at the C relay station as in the second embodiment, the warning device 4A attached to the vehicle 3A that carries the article 1 from the point A to the C relay station has the antenna 5A. Radiates radio waves 7 carrying predetermined data at predetermined intervals. Then, the reading unit 11A reads the encrypted data that the tag 2 returns as a reflected wave of the radio wave 7, and determines whether or not to send a warning.
At the C relay station, instead of storing the second encrypted data obtained by encrypting the tag data with the second encryption key in the tag 2, the second encryption key is stored in the encryption key storage device 31 of the tag 2.
Then, in the warning device 4B attached to the vehicle 3B that carries the article 1 from the C relay station to the B point, the antenna 5B radiates the radio wave 7 carrying predetermined data at predetermined intervals. Then, the reading unit 11B reads the encrypted data that the tag 2 returns as a reflected wave of the radio wave 7 and determines whether or not to send a warning.

Further, as in the third embodiment, when a part of the section is entrusted to another transportation company or the like, the warning device 4A attached to the vehicle 3A that carries the article 1 from the point A to the point C has an antenna 5A. Radio waves 7 carrying predetermined data are radiated at predetermined intervals. Then, the reading unit 11A reads the encrypted data that the tag 2 returns as a reflected wave of the radio wave 7, and determines whether or not to send a warning.
At point C, instead of storing the second encrypted data obtained by encrypting the tag data with the second encryption key in the tag 2, the second encryption key, which is a lower public key of the first encryption key, is used as the encryption key of the tag 2. The data is stored in the storage device 31.
In the warning device 4C attached to the aircraft 8 that carries the article 1 from the point C to the point D, the antenna 5C radiates a radio wave 7 carrying predetermined data at predetermined intervals. Then, the reading unit 11C reads the encrypted data that the tag 2 returns as a reflected wave of the radio wave 7, and determines whether or not to send a warning.
At the point D, the data stored in the encryption key storage device 31 of the tag 2 is not changed.
In the warning device 4B attached to the vehicle 3B that carries the article 1 from the point D to the point B, the antenna 5B radiates a radio wave 7 carrying predetermined data at predetermined intervals. Then, the reading unit 11B reads the encrypted data that the tag 2 returns as a reflected wave of the radio wave 7 and determines whether or not to send a warning.

Embodiment 5 FIG.
In the fifth embodiment, a method for finding a stolen article 1 when a warning is transmitted will be described.

FIG. 8 is a diagram for explaining the outline of the warning system according to the fifth embodiment.
In general, the transportation company has many vehicles 3. Here, for example, it is assumed that the article 1 placed on the vehicle 3A is stolen. In this case, a warning is transmitted to the management device 6 by the method described in the above embodiment (1). As described above, the warning includes identification information of the tag 2.
Then, the management apparatus 6 transmits the identification information of the tag 2 attached to the article 1 stolen by each vehicle 3 (2). In the vehicle 3 that has received the identification information of the stolen tag 2, the radio wave 7 is transmitted from the antenna 5 and the encrypted data is read from the tag 2 as usual.
At this time, it is assumed that the vehicle 3C passes near the stolen article 1. Then, the warning device 4C attached to the vehicle 3C reads the encrypted data from the tag 2 attached to the stolen article 1. When this encrypted data is decrypted, it becomes the identification information of the tag 2 attached to the stolen article 1. Therefore, the vehicle 3C transmits tag detection information indicating that the information of the stolen tag 2 has been detected to the management device 6 (3). At this time, the position information of the vehicle 3C is also transmitted to the management device 6.
Thereby, the place where the stolen article 1 is located can be specified.
Here, it is assumed that the antenna 5 radiates the radio wave 7 over a wider range than the loading platform of the vehicle 3.

FIG. 9 is a functional block diagram illustrating functions of the warning system according to the fifth embodiment.
The warning system includes a tag 2, a plurality of warning devices 4, and a management device 6. In FIG. 9, only one warning device 4 is shown, but the warning system actually includes a plurality of warning devices 4. In FIG. 9, the tag 2 is omitted.

Each warning device 4 includes a reading unit 11, a decryption unit 12, a determination unit 13, a warning unit 14, and a decryption key storage device 15. Further, each warning device 4 includes an identification information receiving unit 19 and a detection information transmitting unit 20.
The management device 6 includes a management device reception unit 21 and a management device transmission unit 22.

Each warning device 4 transmits a warning including the identification information of the tag 2 to the management device 6 as in the above embodiment.
Then, the management device receiving unit 21 of the management device 6 receives the warning transmitted by the warning device 4. The management device transmission unit 22 transmits the identification information of the tag 2 included in the received warning to each warning device 4.
The identification information receiving unit 19 of each warning device 4 receives the identification information of the tag 2 transmitted by the management device 6. Thereafter, the determination unit 13 determines whether the decrypted data generated from the encrypted data read by the reading unit 11 is the identification information of the tag 2 received by the identification information receiving unit 19. When the determination unit 13 determines that the decrypted data generated from the encrypted data read by the reading unit 11 is the identification information of the tag 2 received by the identification information receiving unit 19, the detection information transmission unit 20 The identification information and the position information of the vehicle 3 are transmitted to the management device 6.

  As described above, in the warning system according to the fifth embodiment, a plurality of warning devices 4 notify the management device 6 when data is read from the tag 2 attached to the stolen article 1. Thereby, the location of the stolen article 1 can be specified.

  In the above description, an example in which the vehicle 3 includes the warning device 4 and delivers the article 1 is shown. Here, the vehicle 3 may be a vehicle such as a truck as shown in the figure, or may be another vehicle such as a train, a motorcycle, or a bicycle. Further, the warning device 4 may be provided with not only a vehicle but another vehicle such as an aircraft or a ship, or a person may have it.

  In the above description, the tag data is the identification information of the tag 2. However, the tag data may be other information, and the tag 2 may return encrypted data obtained by encrypting the tag data as a reflected wave and identification information of the tag 2.

  In the above description, the example using the public key encryption method has been described. However, a common key encryption method may be used.

The above is summarized as follows.
The warning device according to the present invention is, for example,
An antenna that emits radio waves within a predetermined range;
A tag attached to an article, wherein the first encrypted data is received via a radio wave radiated by the antenna from a tag storing the first encrypted data in which the tag data is encrypted with a first encryption key. A reading unit for reading;
A storage device storing a first decryption key for decrypting data encrypted with the first encryption key and determination data;
A decryption unit for decrypting the first encrypted data read by the read unit with a first decryption key stored in the storage device and generating first decrypted data by a processing device;
A determination unit that determines whether or not the first decoded data generated by the decoding unit matches the determination data;
A warning unit that issues a warning when the determination unit determines that the first decrypted data does not match the determination data, or when the reading unit cannot read the encrypted data from the tag; It is characterized by.

The warning device further includes:
A tag data update unit for storing the second encrypted data obtained by encrypting the tag data with a second encryption key in the tag, when transferring the management of the article to another warning device;
And a decryption key update unit that stores a second decryption key for decrypting data encrypted with the second encryption key in a storage device included in the other management device.

The tag data update unit stores, in the tag, second encrypted data obtained by encrypting the tag data with a second encryption key that generates encrypted data that can be decrypted with the first decryption key;
The decryption key update unit is a second decryption key that can decrypt only a part of the encrypted data that can be decrypted with the first decryption key, and is encrypted with the second encryption key. The second decryption key for decrypting the stored data is stored in a storage device included in the other management device.

The tag data update unit stores second encrypted data obtained by further encrypting the first encrypted data with the second encryption key in the tag,
The decryption key update unit stores the second decryption key in a storage device included in the other management device, and the other management device stores the first decryption key with an expiration date that is a usable time limit. It is stored in a storage device provided.

The warning device further includes:
When the reading unit reads encrypted data from the tag for the first time, the reading unit includes an identification information transmitting unit that transmits the identification information of the tag and the identification information of the warning device itself to a predetermined management device.

The warning system according to the present invention is:
A warning system comprising a plurality of warning devices;
The first warning device among the plurality of warning devices is:
A first antenna that radiates radio waves within a predetermined range;
A tag attached to an article, wherein the first encryption is performed via a radio wave radiated by the first antenna from a tag storing the first encrypted data in which the tag data is encrypted with a first encryption key. A first reading unit for reading data;
A first storage device storing a first decryption key and decryption data for decrypting data encrypted with the first encryption key;
A first decryption unit for decrypting the first encrypted data read by the first read unit with a first decryption key stored in the first storage device and generating first decrypted data by a processing device;
A first determination unit that determines, by a processing device, whether or not the first decoded data generated by the first decoding unit matches the determination data;
A first warning is issued when the first determination unit determines that the first decrypted data does not match the determination data, or when the first reading unit cannot read the encrypted data from the tag. A warning section;
When the management of the article is transferred to a second warning device among the plurality of warning devices, a first tag data update for storing the second encrypted data in which the tag data is encrypted with a second encryption key in the tag And
A first decryption key update unit for storing a second decryption key for decrypting data encrypted with the second encryption key and determination data in a second storage device included in the second management device;
The second warning device includes:
A second antenna that radiates radio waves within a predetermined range;
A second reading unit, which is a tag attached to an article, and reads out the second encrypted data from a tag storing the second encrypted data via a radio wave radiated from the second antenna;
A second storage device that stores the second decryption key and the determination data by the first decryption key update unit;
A second decryption unit for decrypting the second encrypted data read by the second readout unit with a second decryption key stored in the second storage device and generating second decrypted data by the processing device;
A second determination unit that determines, by a processing device, whether or not the second decoded data generated by the second decoding unit matches the determination data;
A second warning is issued when the second determination unit determines that the second decrypted data does not match the determination data, or when the second reading unit cannot read the encrypted data from the tag. And a warning section.

The warning system according to the present invention is:
A warning system comprising a plurality of warning devices and a management device;
Each warning device of the plurality of warning devices is:
An antenna that emits radio waves within a predetermined range;
A tag attached to an article, the tag data being encrypted with a first encryption key, and a tag storing tag identification information, and via a radio wave radiated by the antenna A reading unit for reading out the first encrypted data and the identification information;
A storage device storing a first decryption key for decrypting data encrypted with the first encryption key and determination data;
A decryption unit for decrypting the first encrypted data read by the read unit with a first decryption key stored in the storage device and generating first decrypted data by a processing device;
A determination unit that determines whether or not the first decoded data generated by the decoding unit matches the determination data;
When the determination unit determines that the first decrypted data does not match the determination data, or when the reading unit cannot read the encrypted data from the tag, a warning including identification information of the tag is issued. A warning unit for transmitting to the management device via a communication device,
The management device
A management device receiving unit that receives the warning transmitted by the warning unit via a communication device;
When the receiving unit receives a warning, a management device transmitting unit that transmits identification information included in the warning to the plurality of warning devices via a communication device,
Each warning device further includes:
An identification information receiving unit that receives the identification information transmitted by the management device transmitting unit via a communication device;
When the identification information received by the identification information receiving unit is received from a tag, a detection information transmission unit is provided that transmits tag detection information to the management device via a communication device.

The warning system according to the present invention is:
A warning system comprising a tag attached to an article and a warning device that reads data from the tag;
The warning device is
It has an antenna that emits radio waves with predetermined data in a predetermined range,
The tag is
An encryption key storage device for storing the first encryption key;
When receiving a radio wave radiated from the antenna, an encryption unit is provided that encrypts predetermined data carried on the radio wave with a first encryption key stored in the encryption key storage device to generate first encrypted data. ,
The warning device further includes:
A reading unit that reads out the first encrypted data encrypted by the encryption unit via a radio wave radiated from the antenna;
A decryption key storage device storing a first decryption key for decrypting data encrypted with the first encryption key;
A decryption unit that decrypts the first encrypted data read by the read unit with a first decryption key stored in the decryption key storage device and generates first decryption data by a processing device;
A determination unit that determines, by a processing device, whether or not the first decoded data generated by the decoding unit matches the predetermined data;
A warning unit that issues a warning when the determination unit determines that the first decrypted data does not match the predetermined data, or when the reading unit cannot read the encrypted data from the tag; It is characterized by that.

The warning system includes a plurality of the warning devices,
The warning device further includes:
A tag data updating unit for storing a second encryption key different from the first encryption key in the encryption key storage device when transferring the management of the article to another warning device;
And a decryption key update unit that stores a second decryption key for decrypting data encrypted with the second encryption key in a decryption key storage device included in the other management device.

The tag data update unit stores a second encryption key for generating encrypted data that can be decrypted with the first decryption key in the encryption key storage device,
The decryption key update unit is a second decryption key that can decrypt only a part of the encrypted data that can be decrypted with the first decryption key, and is encrypted with the second encryption key. The second decryption key for decrypting the stored data is stored in a decryption key storage device provided in the other management device.

The warning program according to the present invention is:
A tag attached to an article, wherein the first encrypted data is transmitted from a tag storing the first encrypted data in which the tag data is encrypted with a first encryption key via a radio wave radiated from the antenna. Reading process for reading
A decryption process for decrypting the first encrypted data read by the read process with a first decryption key stored in a storage device and generating the first decrypted data by the processing device;
A determination process for determining by the processing device whether or not the first decoded data generated by the decoding process matches the determination data stored in the storage device;
A warning process that issues a warning when it is determined in the determination process that the first decrypted data does not match the determination data, or when the encrypted data cannot be read from the tag in the read process. It is characterized by.

Next, the hardware configuration of the warning device 4 and the management device 6 in the above embodiment will be described.
FIG. 10 is a diagram illustrating an example of a hardware configuration of the warning device 4 and the management device 6.
As shown in FIG. 10, the warning device 4 and the management device 6 include a CPU 911 (also referred to as a central processing unit, a central processing unit, a processing unit, a processing unit, a microprocessor, a microcomputer, and a processor) that executes a program. ing. The CPU 911 is connected to the ROM 913, the RAM 914, the LCD 901 (Liquid Crystal Display), the keyboard 902 (K / B), the communication board 915, and the magnetic disk device 920 via the bus 912, and controls these hardware devices. Instead of the magnetic disk device 920 (fixed disk device), a storage device such as an optical disk device or a memory card read / write device may be used. The magnetic disk device 920 is connected via a predetermined fixed disk interface.

  The ROM 913 and the magnetic disk device 920 are examples of a nonvolatile memory. The RAM 914 is an example of a volatile memory. The ROM 913, the RAM 914, and the magnetic disk device 920 are examples of a storage device (memory). The keyboard 902 and the communication board 915 are examples of input devices. The communication board 915 is an example of a communication device (network interface). Furthermore, the LCD 901 is an example of a display device.

  An operating system 921 (OS), a window system 922, a program group 923, and a file group 924 are stored in the magnetic disk device 920 or the ROM 913. The programs in the program group 923 are executed by the CPU 911, the operating system 921, and the window system 922.

The program group 923 includes “reading unit 11”, “decoding unit 12”, “determination unit 13”, “warning unit 14”, “tag data update unit 16”, “identification information transmission unit 17”, Software or program for executing the functions described as “decryption key update unit 18”, “identification information reception unit 19”, “detection information transmission unit 20”, “management device reception unit 21”, “management device transmission unit 22”, etc. And other programs are stored. The program is read and executed by the CPU 911.
In the file group 924, information, data, signal values, variable values, and parameters such as “tag data”, “encrypted data”, “decrypted data”, “result”, “warning” in the above description are stored in the “file data”. And “database”. The “file” and “database” are stored in a recording medium such as a disk or a memory. Information, data, signal values, variable values, and parameters stored in a storage medium such as a disk or memory are read out to the main memory or cache memory by the CPU 911 via a read / write circuit, and extracted, searched, referenced, compared, and calculated. Used for the operation of the CPU 911 such as calculation / processing / output / printing / display. Information, data, signal values, variable values, and parameters are temporarily stored in the main memory, cache memory, and buffer memory during the operation of the CPU 911 for extraction, search, reference, comparison, calculation, calculation, processing, output, printing, and display. Is remembered.

In the above description, the arrows in the flowchart mainly indicate input / output of data and signals, and the data and signal values are recorded in a memory of the RAM 914, other recording media such as an optical disk, and an IC chip. Data and signals are transmitted online by a bus 912, signal lines, cables, other transmission media, and radio waves.
In addition, what is described as “to part” in the above description may be “to circuit”, “to device”, “to device”, “to means”, and “to function”. It may be “step”, “˜procedure”, “˜processing”. In addition, what is described as “˜device” may be “˜circuit”, “˜device”, “˜means”, “˜function”, and “˜step”, “˜procedure”, “ ~ Process ". Furthermore, what is described as “to process” may be “to step”. That is, what is described as “˜unit” may be realized by firmware stored in the ROM 913. Alternatively, it may be implemented only by software, or only by hardware such as elements, devices, substrates, and wirings, by a combination of software and hardware, or by a combination of firmware. Firmware and software are stored in a recording medium such as ROM 913 as a program. The program is read by the CPU 911 and executed by the CPU 911. That is, the program causes a computer or the like to function as the “˜unit” described above. Alternatively, the computer or the like is caused to execute the procedures and methods of “to part” described above.

  1 article, 2 tag, 3 vehicle, 4 warning device, 5 antenna, 6 management device, 7 radio wave, 8 aircraft, 11 reading unit, 12 decryption unit, 13 determination unit, 14 warning unit, 15 decryption key storage device, 16 Tag data update unit, 17 Identification information transmission unit, 18 Decryption key update unit, 19 Identification information reception unit, 20 Detection information transmission unit, 21 Management device reception unit, 22 Management device transmission unit, 31 Encryption key storage device, 32 Encryption Department.

Claims (3)

An alarm system for theft of goods in a company that has a plurality of vehicles and transports articles by the vehicles, and is a warning system comprising a warning device installed in each vehicle and a management device,
The warning device is
An antenna that radiates radio waves within a predetermined range including the outside of the installed vehicle;
A reading unit for pre SL antenna reads the identification information of the tag attached to an article via radio waves radiated,
When said reading unit becomes unreadable the identification information from the tag, and a warning unit for sending an alert including the identification information which the reading unit is no longer allowed read out to the management device via the communication device,
The management device
A management device receiving unit that receives the warning transmitted by the warning unit via a communication device;
A management device transmitting unit that transmits identification information included in the warning to a warning device installed in each vehicle via a communication device when the receiving unit receives the warning;
The warning device further includes:
An identification information receiving unit that receives the identification information transmitted by the management device transmitting unit via a communication device;
A warning system, comprising: a detection information transmission unit that transmits tag detection information to the management device via a communication device when the identification information received by the identification information reception unit is received from a tag. The said detection information transmission part transmits the tag detection information containing the positional information which shows the position which received the identification information which the said identification information receiving part received from the tag to the said management apparatus, The said management apparatus is characterized by the above-mentioned. Warning system. The reading unit reads the first encrypted data and the identification information from a tag storing the first encrypted data in which the tag data is encrypted with the first encryption key and the tag identification information,
The warning device further includes:
A storage device storing a first decryption key for decrypting data encrypted with the first encryption key and determination data;
A decryption unit for decrypting the first encrypted data read by the read unit with a first decryption key stored in the storage device and generating first decrypted data by a processing device;
A determination unit that determines by a processing device whether or not the first decoded data generated by the decoding unit matches the determination data;
The warning unit, when the determination unit determines that the first decoded data does not match the determination data, transmits a warning including the identification information read by the reading unit to the management device. Item 3. The warning system according to item 1 or 2.

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