JP2015032954A - Information processing device, information processing method, program for information processing device, information processing system, and terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information processing device and others which inhibit contents of operation instructions from being leaked outside.SOLUTION: An information processing method includes the steps in which: an information processing device acquires in-facility information of a terminal device 20 in a facility 30 (S1); the information processing device generates an encryption key corresponding to the in-facility information (S2); the information processing device encrypts data to be transmitted to the terminal device 20 by the generated encrypted key (S3); the terminal device 20 receives the encrypted data and generates an encryption key corresponding to the in-facility information of its own terminal device 20 in the facility 30 (S5); and decrypts the received data by the generated encrypted key (S6).

Description

  The present invention relates to an information processing device, an information processing method, a program for an information processing device, an information processing system, and a terminal device that communicate data.

  Electronic paper capable of electrically rewriting display contents is used for work instructions for each process in a factory. For example, Patent Document 1 discloses a work instruction display and result collection system in which work instruction data is transmitted to a portable information terminal via wireless communication means.

JP 2012-003721 A

  However, in the technique of Patent Document 1, when work instruction data is wirelessly transmitted to a portable information terminal such as electronic paper, there is a problem in that work instruction contents are leaked to the outside due to wiretapping of communication contents.

  Therefore, the present invention has been made in view of the above-described problems, and an example of the problem is to provide an information processing apparatus and the like that prevent leakage of work instruction contents to the outside.

  In order to solve the above-described problem, the invention according to claim 1 is a facility for acquiring in-facility information acquisition means for acquiring in-facility information of a terminal device in the facility, and an encryption key for generating an encryption key corresponding to the in-facility information. Key generation means, and encryption means for encrypting data to be transmitted to the terminal device with the encryption key.

  The invention according to claim 2 is the information processing apparatus according to claim 2, wherein the in-facility information is position information of the terminal device in the facility.

  According to a third aspect of the present invention, in the information processing apparatus according to the first or second aspect, the encryption key generation unit responds to different information each time the in-facility information and the data are transmitted. And generating the encryption key.

  According to a fourth aspect of the present invention, there is provided the information processing device according to any one of the first to third aspects, wherein the data is encrypted according to the in-facility information. When the data is not encrypted, the encryption means does not encrypt the data to be transmitted to the terminal device.

  The invention according to claim 5 is an information processing method for an information processing device, the facility information acquiring step for acquiring facility information of the terminal device in the facility, and an encryption key corresponding to the facility information And an encryption step for encrypting data to be transmitted to the terminal device with the encryption key.

  Further, the invention according to claim 6 is an information processing unit for acquiring in-facility information of a terminal device in the facility, an encryption key generating unit for generating an encryption key corresponding to the in-facility information, and , And functioning as encryption means for encrypting data to be transmitted to the terminal device using the encryption key.

  The invention according to claim 7 is an information processing system including a terminal device in a facility and an information processing device that communicates with the terminal device, wherein the information processing device is provided in the facility. In-facility information acquisition means for acquiring in-facility information of the terminal device, encryption key generation means for generating an encryption key corresponding to the in-facility information, and data to be transmitted to the terminal device are encrypted with the encryption key. And receiving means for receiving the encrypted data from the information processing device, and an encryption key corresponding to in-facility information of the terminal device itself in the facility. It has an encryption key generation means to generate, and a decryption means for decrypting the received data with the encryption key.

  The invention according to claim 8 is a terminal device that acquires data from an information processing device, the receiving means for receiving encrypted data from the information processing device, and the terminal device itself in a facility. An encryption key generating unit that generates an encryption key according to in-facility information; and a decrypting unit that decrypts the received data with the encryption key.

  According to the present invention, it is possible to prevent leakage of work instruction contents to the outside.

It is a mimetic diagram showing an example of outline composition of an information processing system concerning an embodiment of the present invention. FIG. 2 is a block diagram illustrating a schematic configuration example of the information processing apparatus in FIG. 1. It is a schematic diagram which shows an example of the map information of a facility. It is a schematic diagram which shows an example of the terminal ID list memorize | stored in the encryption information database of FIG. It is a schematic diagram which shows an example of the key information memorize | stored in the encryption information database of FIG. It is a schematic diagram which shows an example of the access point list memorize | stored in the encryption information database of FIG. It is a block diagram which shows the example of a schematic structure of the terminal device of FIG. It is a schematic diagram which shows an example of the terminal device of FIG. It is a sequence diagram which shows the operation example of the information processing system of FIG. It is a schematic diagram which shows the outline | summary of an example of a manufacturing process. It is a sequence diagram which shows the operation example of the affiliation update of the terminal device in the information processing system of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiment described below is an embodiment when the present invention is applied to an information processing system.

[1. Overview of information processing system configuration and functions]
First, the configuration and outline function of an information processing system according to an embodiment of the present invention will be described with reference to FIG.

  FIG. 1 is a schematic diagram illustrating a schematic configuration example of an information processing system according to an embodiment of the present invention.

  As illustrated in FIG. 1, the information processing system 1 includes an information processing device 10 connected to a wireless device 5 disposed in a plurality of places within a predetermined range, and a terminal device 20 capable of communicating with the wireless device 5. . Further, the information processing system 1 includes a reader 7 that reads the terminal device 20.

  The information processing apparatus 10 and each wireless device 5 are connected through a network 3 such as a LAN (Local Area Network). Each wireless device 5 and each terminal device 20 communicate with each other by short-range wireless communication. For example, each wireless device 5 and each terminal device 20 perform communication in the range of 10 m to 100 m by short-range wireless communication in the 2.4 GHz band. The network 3 may be, for example, the Internet, a dedicated communication line (for example, a CATV (Community Antenna Television) line), or a mobile communication network (including a base station).

  The wireless device 5 is a base station (access point) and has a transmission function and a reception function. The wireless device 5 is installed on the ceiling or wall of a facility such as a factory (an example of a predetermined range), for example. The terminal device 20 is arranged so as to be able to communicate anywhere in the facility. Each wireless device 5 is assigned an access point ID (an example of in-facility information).

  The reader 7 is, for example, a bar code reader or an IC tag reader. In a plurality of processes, the reader 7 is installed at a position for reading the terminal device 20 that has entered the first process, for example.

  The information processing apparatus 10 estimates the position of the terminal device 20 or transmits data to be displayed on the terminal device 20.

  The terminal device 20 is attached to an article (an example of an object corresponding to the terminal apparatus), or attached to a loading platform or a container (an example of an object corresponding to the terminal apparatus) that carries the article.

[2. Configuration and Function of Information Processing Device and Each Terminal Device]
(2.1 Configuration and function of information processing apparatus 10)
Next, the configuration and function of the information processing apparatus 10 will be described with reference to FIGS.

  FIG. 2 is a block diagram illustrating a schematic configuration example of the information processing apparatus 10. FIG. 3 is a schematic diagram illustrating an example of facility map information. FIG. 4 is a schematic diagram showing an example of a terminal ID list stored in the encryption information database. FIG. 5 is a schematic diagram illustrating an example of key information stored in the encryption information database. FIG. 6 is a schematic diagram showing an example of an access point list stored in the encryption information database.

  As illustrated in FIG. 2, the information processing apparatus 10 includes a communication unit 11, a storage unit 12, a display unit 13, an operation unit 14, an input / output interface unit 15, and a system control unit 16. . The system control unit 16 and the input / output interface unit 15 are connected via a system bus 17.

  The communication unit 11 is connected to the network 3 and controls the communication state with the terminal device 20 via the wireless device 5.

  The storage unit 12 (an example of a storage unit) includes, for example, a hard disk drive, a silicon disk drive, and the like, and stores various programs such as an operating system and a server program, map information, and the like. Note that the various programs may be acquired from, for example, another server device via the network 3, or may be recorded on a recording medium and read via a drive device.

  Further, the storage unit 12 includes a map information database 12a (hereinafter referred to as “map information DB 12a”), a position information database 12b (hereinafter referred to as “position information DB 12b”), a display information database 12c (hereinafter referred to as “display information DB 12c”). ”), An encryption information database 12d (hereinafter referred to as“ encryption information DB 12d ”) and the like.

  In the map information DB 12a, as floor map data (an example of in-facility information), the arrangement information of the passage 31 in the facility 30 as shown in FIG. 3, the arrangement information of the room 32, and an apparatus for processing or manufacturing the article 33 arrangement information, arrangement information of the article hangar 34 and the like, and arrangement information of the wireless device 5 are stored. A passage ID (an example of in-facility information) is assigned to each passage 31, and the start point, end point, length, width, and the like of the passage are stored in the map information DB 12a. Also, each wireless device 5, each room 32, each device 33, and each storage 34 is assigned an access point ID (AP / ID), room ID, device ID, and storage ID as examples of in-facility information. ing.

  Each device 33 is used in each step of manufacturing a product. The product is transported to the loading platform 40 to which the terminal device 20 is attached. Each process is assigned a process number or process ID as an example of in-facility information.

  Further, in the map information DB 12a, non-existence information indicating a place where an article to which the terminal device 20 is associated cannot exist, and hangar information indicating the number of articles in the hangar are stored in association with the hangar ID. Here, the non-existence information is, for example, an non-existence area where an article corresponding to the terminal device 20 is not placed, such as an area 35 (for example, a toilet, a changing room, an office, the outside of the facility 30, etc.), a wall, and the like. It is position information to show.

  Here, the passage 31 is an example of a moving area in which the terminal device 20 attached to an article or the like moves. The hangar 34 is an example of a stop area where the terminal device 20 attached to an article or the like is stopped. The area 35, the wall, and the like are examples of nonexistent areas. The movement area such as the passage 31, the stop area such as the storage 34, and the area where the area 35 cannot exist are examples of setting areas that are set according to the movement state.

  In the position information DB 12b, the position information and time of each terminal device 20 are stored in association with the terminal ID of each terminal device 20 as the position history of each terminal device 20. For example, as shown in FIG. 3, a coordinate axis with a predetermined location of the facility 30 as the origin is set. Further, in the position information DB 12b, information (for example, a process number) relating to a manufacturing process of a product is stored in association with the terminal ID of each terminal device 20 as an example of in-facility information. In addition, in the location information DB 12b, as an example of in-facility information, the coordinates of the terminal device 20 based on the set coordinate axes or the area where the terminal device 20 exists (room ID, device ID, etc. of each room 32) It may be stored associated with the terminal ID of each terminal device 20.

  Display information to be displayed on each terminal device 20 is stored in the display information DB 12c. For example, the display information indicating the work instruction information includes an article name, a customer name, specifications, a code, a lot number, an image related to the article, and the like. In the display information DB 12c, display information of each terminal device 20 is stored in association with the terminal ID. Further, the work instruction information includes instructions regarding manufacturing processes, information regarding manufacturing, transportation destinations, and the like. In the display information DB 12c, display information of each terminal device 20 is stored in association with the terminal ID. The work instruction information is managed for each product, each process, and the like.

  Further, in the display information DB 12c, as shown in FIG. 4, as the terminal ID list, the terminal ID of the terminal device 20 and the access point to which the terminal device 20 currently belongs (close to the terminal device 20 and having high radio field strength). (Access point) information (access point ID) and the number of rewrites of display on the terminal device 20 are stored in association with each other. Here, the access point ID (affiliated AP information) of the access point to which the terminal device 20 currently belongs is an example of in-facility information.

  As shown in FIG. 5, key information of the encryption key is stored in the encryption information DB 12d. Also, in the encryption information DB 12d, as shown in FIG. 6, as an access point list, information on the manufacturing process of a product as an example of in-facility information and encryption derivative key information for each access point ID (for example, Process ID, process number, etc.) are stored in association with each other. Here, the information on the derived key is generated from the key seed and the access point ID.

  The display unit 13 is configured by, for example, a liquid crystal display element or an EL (Electro Luminescence) element.

  The operation unit 14 is configured by, for example, a keyboard and a mouse.

  The input / output interface unit 15 performs interface processing between the communication unit 11 and the like and the system control unit 16.

  The system control unit 16 includes a CPU (Central Processing Unit) 16a, a ROM (Read Only Memory) 16b, a RAM (Random Access Memory) 14c, and the like. Then, the system control unit 16 calculates the movement state of each terminal device from the position information of each terminal device 20, or refers to the map information and determines the position of the terminal device 20 according to the position information and the movement state. Or correct it.

(2.2 Configuration and Function of Terminal Device 20)
Next, the configuration and function of the terminal device 20 will be described with reference to FIGS. 7 and 8.
FIG. 7 is a block diagram illustrating an example of a schematic configuration of the terminal device 20. FIG. 8 is a schematic diagram illustrating an example of the terminal device 20.

  As illustrated in FIG. 7, the terminal device 20 that functions as a computer includes a communication unit 21, a storage unit 22, a display unit 23, an operation unit 24, an input / output interface unit 25, and a system control unit 26. ing. The terminal device 20 includes a power source (not shown) such as a small battery. The system control unit 26 and the input / output interface unit 25 are connected via a system bus 27.

  The communication unit 21 has a wireless communication function, and controls communication with the information processing apparatus 10 and the like through the wireless device 5. The communication unit 21 has a function of measuring the radio wave reception intensity of the radio wave from each radio device 5 as an example of a measurement unit that measures the radio wave reception intensity due to communication with each radio device.

  The storage unit 22 includes, for example, a nonvolatile memory such as a flash memory, and stores a program such as an operating system. The storage unit 22 stores a terminal ID indicating the terminal device 20 itself. The storage unit 22 stores key seed information common to the information processing apparatus 10. In addition, the storage unit 22 stores the belonging AP information of the wireless device 5 to which it currently belongs and the number of times of display rewriting.

  The display unit 23 (an example of a display unit) is configured by, for example, an electronic paper element. The first display unit 23 is electronic paper such as a microcapsule method, an electronic powder fluid method, a liquid crystal method, and an electrophoresis method. The first display unit 23 may be configured by an EL element or the like.

  As shown in FIG. 8, the display unit 23 displays the product name, customer name, specification, code, lot number, date, image related to the product, and the like.

  As illustrated in FIG. 8, the operation unit 24 includes, for example, operation buttons. The operation buttons are used to turn on / off the power, display the next page, display the latest information, and the like.

  The input / output interface unit 25 is an interface between the communication unit 21 and the like and the system control unit 26.

  The system control unit 26 includes, for example, a CPU 26a, a ROM 26b, and a RAM 26c. In the system control unit 26, the CPU 26 a reads out and executes various programs stored in the ROM 26 b, the RAM 26 c, and the storage unit 22.

  As shown in FIG. 8, the terminal device 20 has a code 20 a that is read by the reader 7. The code 20 a corresponds to the terminal ID of the terminal device 20. The terminal device 20 may incorporate an IC tag instead of the code 20a.

[3. Operation of Information Processing System 1]
Next, the operation of the information processing system 1 according to one embodiment of the present invention will be described with reference to FIGS.

  FIG. 9 is a sequence diagram illustrating an operation example of the information processing system 1. FIG. 10 is a schematic diagram showing an outline of an example of the manufacturing process. FIG. 11 is a sequence diagram illustrating an operation example of affiliation update of the terminal device in the information processing system 1.

(3.1 Operation of displaying work instruction information)
The operation of displaying work instruction information will be described with reference to FIGS.

  As shown in FIG. 9, the information processing system 1 acquires a terminal ID and the like (step S1). Specifically, as shown in FIG. 10, before the loading platform 40 to which the terminal device 20 is attached is carried into the place of the first manufacturing process, the reader 7 rewrites (updates) the display data. The code 20a of the terminal device 20 is read. Then, the information processing device 10 acquires the terminal ID of the terminal device 20. The information processing apparatus 10 reads the code 20 a of the terminal device 20 in order to measure the timing of rewriting (updating) display data. Further, the information processing apparatus 10 acquires work instruction information instructing the terminal apparatus 20 with reference to the display information DB 12c based on the terminal ID.

  Next, the information processing apparatus 10 refers to the display information DB 12c based on the acquired terminal ID, and acquires the affiliated AP information and the number of display rewrites.

  In this way, the information processing apparatus 10 functions as an example of an in-facility information acquisition unit that acquires in-facility information of the terminal device in the facility.

  Next, the information processing system 1 generates an encryption key from the terminal ID, the affiliated AP information, and the display rewrite count (step S2). Specifically, the information processing apparatus 10 reads out the derived key information with reference to the access point list in the encryption information DB 12d based on the acquired belonging AP information. Then, the information processing apparatus 10 generates an encryption key by performing padding for adjusting the number of digits from the derived key information and the acquired number of rewrites.

  In this way, the information processing apparatus 10 functions as an example of an encryption key generation unit that generates an encryption key corresponding to the in-facility information. Further, the information processing apparatus 10 functions as an example of an encryption key generation unit that generates the encryption key according to the in-facility information and information that is different each time the data is transmitted.

  Next, the information processing system 1 encrypts the work instruction information (step S3). Specifically, the information processing apparatus 10 encrypts the work instruction information based on the generated encryption key.

  As described above, the information processing apparatus 10 functions as an example of an encryption unit that encrypts data to be transmitted to the terminal device using the encryption key.

  Next, the information processing system 1 transmits the encrypted work instruction information (step S4). Specifically, the information processing device 10 transmits the encrypted work instruction information to the terminal device 20 corresponding to the acquired terminal ID via the wireless device 5 corresponding to the affiliated AP information.

  Next, the information processing system 1 generates an encryption key from the affiliation AP information and the display rewrite count (step S5). Specifically, the terminal device 20 reads the key seed, the belonging AP information, and the display rewrite count from the storage unit 22. Then, the terminal device 20 generates a derived key from the key seed and the belonging AP information. The terminal device 20 generates an encryption key by padding or the like for adjusting the number of digits from the generated derived key and the display rewrite count.

  Thus, the terminal device 20 functions as an example of a receiving unit that receives the encrypted data from the information processing device. In addition, the terminal device 20 functions as an example of an encryption key generation unit that generates an encryption key corresponding to the in-facility information of the terminal device itself in the facility.

  Next, the information processing system 1 decrypts the encrypted work instruction information (step S6). Specifically, the terminal device 20 decrypts the received work instruction information based on the generated encryption key.

  Thus, the terminal device 20 functions as an example of a decryption unit that decrypts the received data with the encryption key.

  Next, the information processing system 1 displays work instruction information (step S7). Specifically, the terminal device 20 displays the decrypted work instruction information on the display unit 23.

  Next, the information processing system 1 counts up the number of rewrites (step S8). Specifically, the terminal device 20 counts up and updates the display rewrite count stored in the storage unit 22.

  Next, the information processing system 1 responds with an ACK indicating successful rewriting (step S9). Specifically, the terminal device 20 transmits an ACK (acknowledgement) response including the updated number of rewrites to the information processing device 10 via the wireless device 5.

  Next, the information processing system 1 updates the display rewrite count (step S10). Specifically, the information processing apparatus 10 receives the ACK signal and updates the display rewrite count of the terminal ID list in the display information DB 12c.

(3.2 Operation of affiliation update)
Next, the affiliation update operation will be described with reference to FIG.

  When the loading platform 40 to which the terminal device 20 is attached moves within the facility 30, the belonging AP changes. In order to use the latest in-house information and reflect it in the encryption, the AP to which the terminal device 20 belongs is updated.

  As shown in FIG. 11, the information processing system 1 receives beacons from a plurality of APs (step S20). Specifically, the terminal device 20 receives beacons (synchronization signals) from the plurality of wireless devices 5 while switching channels. The access point ID is included in the beacon information.

  Next, the information processing system 1 determines the AP with the highest radio field intensity (step S21). Specifically, the terminal device 20 determines the wireless device 5 having the strongest radio wave intensity by the function of measuring the radio wave reception intensity of the communication unit 21.

  Next, the information processing system 1 transmits the change information of the affiliated AP information (step S22). Specifically, when the terminal device 20 compares the belonging AP information stored in the storage unit 22 with the determined access point ID of the wireless device 5, the terminal device 20 determines the access point ID of the determined wireless device 5. Is transmitted to the information processing apparatus 10 together with the terminal ID.

  Next, the information processing system 1 receives the change information (step S23). Specifically, the information processing apparatus 10 receives change information of belonging AP information from the terminal apparatus 20.

  Next, the information processing system 1 changes the belonging AP information (step S24). Specifically, the information processing apparatus 10 changes the belonging AP information in the terminal ID list of the display information DB 12c based on the terminal ID.

  As described above, according to the present embodiment, in-facility information (for example, belonging AP information) of the terminal device 20 in the facility 30 is acquired, an encryption key corresponding to the in-facility information is generated, and the terminal device 20 is based on the encryption key. By encrypting the data to be transmitted to the facility 30, the facility 30 is shielded from the outside, the terminal device 20 is not visible from the outside, and an encryption key that is difficult to understand from outside is generated. Since the data is encrypted and transmitted, leakage of work instruction contents can be prevented.

  Further, when the in-facility information is position information of the terminal device 20 in the facility (for example, belonging AP information, process ID, coordinates of the terminal device 20), the terminal device 20 moves in the facility 30 and moves Is not visible from the outside, an encryption key that is difficult to understand from the outside is generated, and the work instruction content is encrypted and transmitted using this encryption key, so that leakage of the work instruction content can be prevented and security is improved.

  Further, since encryption is performed using common in-facility information, it is not necessary to transmit prior information for generating an encryption key, so that power consumption can be reduced.

  In addition, when an encryption key is generated according to in-facility information and information that differs each time data is transmitted (for example, the number of times displayed), the encryption key is different every time data is transmitted, and is difficult to understand from the outside. Since the key is generated and the work instruction content is encrypted and transmitted using the encryption key, leakage of the work instruction content can be prevented.

  In addition, as shown in FIG. 10, the code 20a of the terminal device 20 is read by the reader 7 for each manufacturing process, the in-facility information (process ID) is acquired, and the encryption key is generated based on the process ID. Good. Here, the loading platform 40 to which the terminal device 20 is attached is moved to the device 33 in each process, and the product P is manufactured in the device 33. The manufactured product P is carried out, and the loading platform 40 to which the terminal device 20 is attached returns to the place of the first manufacturing process.

  Further, since the number of rewrites displayed on the terminal device 20 is for changing the encryption key, a one-time password using time or the like may be used instead of the number of rewrites displayed on the terminal device 20.

  Further, the coordinate position of the terminal device 20 in the facility 30 is obtained by calculating the distance from each radio device 5 by referring to the equation of attenuation of the radio wave intensity from the radio wave intensity from at least three radio devices 5. The position information of the terminal device 20 may be calculated by a surveying method. Further, the position of the terminal device 20 may be calculated from the measured value of the arrival time of the radio wave from the wireless device 5 by a three-point survey method.

  Further, encryption may or may not be performed depending on the facility information. When the information processing apparatus 10 transmits data to the terminal apparatus 20, the information processing apparatus 10 also transmits information indicating whether the data is encrypted data. For example, the information processing apparatus 10 does not perform encryption when it is a work instruction regarding an unimportant process or when the terminal apparatus 20 is in a place where radio waves are difficult to leak.

  Then, in the case of encrypted data, the terminal device 20 omits the encryption key generation process (step S5) and the decryption process (step S6). As described above, there is a case where it is not necessary to perform encryption, and it is not necessary to perform encryption every time, and power saving can be achieved.

  In addition, each time the worker presses the button of the operation unit 24 of the terminal device 20, the work process may be updated and the information processing apparatus 10 may be notified of the update of the work process. At this time, the encryption key may be changed by changing the number of display times.

  For example, it is assumed that the information processing apparatus 10 and the terminal apparatus 20 have common process flow information. When the worker finishes one work process, the work process information is updated by pressing a button on the terminal device 20. By notifying the information processing apparatus 10 of the update of the work process at that time, the work process information in the information processing apparatus 10 can be updated without installing the reader 7 in each process. In this case, the process management may not be associated with the access point ID.

  Further, the terminal device 20 may be provided with an encryption / non-encryption button so that the presence / absence of encryption can be set from work process information in different work processes at the same place.

  Furthermore, the present invention is not limited to the above embodiments. Each of the embodiments described above is an exemplification, and any configuration that has substantially the same configuration as the technical idea described in the claims of the present invention and has the same operational effects can be used. It is included in the technical scope of the present invention.

1: Information processing system 5: Radio 10: Information processing device 20: Terminal device 30: Facility

Claims (8)

In-facility information acquisition means for acquiring in-facility information of the terminal device in the facility;
An encryption key generating means for generating an encryption key according to the in-facility information;
Encryption means for encrypting data to be transmitted to the terminal device with the encryption key;
An information processing apparatus comprising: The information processing apparatus according to claim 2,
The information processing apparatus according to claim 1, wherein the in-facility information is position information of the terminal device in the facility. The information processing apparatus according to claim 1 or 2,
The information processing apparatus, wherein the encryption key generation unit generates the encryption key according to the in-facility information and different information each time the data is transmitted. The information processing apparatus according to any one of claims 1 to 3,
According to the in-facility information, further comprising an encryption determination means for determining whether to encrypt the data;
When the data is not encrypted, the encryption unit does not encrypt data to be transmitted to the terminal device. An information processing method for an information processing apparatus,
In-facility information acquisition step of acquiring in-facility information of the terminal device in the facility;
An encryption key generating step for generating an encryption key according to the in-facility information;
An encryption step of encrypting data to be transmitted to the terminal device with the encryption key;
An information processing method comprising: Computer
In-facility information acquisition means for acquiring in-facility information of terminal devices in the facility,
An encryption key generating means for generating an encryption key according to the in-facility information; and
A program for an information processing apparatus that causes data to be transmitted to the terminal apparatus to function as an encryption unit that encrypts data using the encryption key. An information processing system comprising a terminal device in a facility and an information processing device that communicates with the terminal device,
The information processing apparatus is
In-facility information acquisition means for acquiring in-facility information of the terminal device in the facility;
An encryption key generating means for generating an encryption key according to the in-facility information;
Encryption means for encrypting data to be transmitted to the terminal device with the encryption key;
Have
The terminal device is
Receiving means for receiving the encrypted data from the information processing apparatus;
An encryption key generating means for generating an encryption key according to the facility information of the terminal device itself in the facility;
Decryption means for decrypting the received data with the encryption key;
An information processing system comprising: A terminal device that acquires data from an information processing device,
Receiving means for receiving encrypted data from the information processing apparatus;
An encryption key generating means for generating an encryption key according to the facility information of the terminal device itself in the facility;
Decryption means for decrypting the received data with the encryption key;
A terminal device comprising:

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