WO2012164666A1 - Système de collecte d'informations et dispositif d'accès externe - Google Patents

Système de collecte d'informations et dispositif d'accès externe Download PDF

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Publication number
WO2012164666A1
WO2012164666A1 PCT/JP2011/062406 JP2011062406W WO2012164666A1 WO 2012164666 A1 WO2012164666 A1 WO 2012164666A1 JP 2011062406 W JP2011062406 W JP 2011062406W WO 2012164666 A1 WO2012164666 A1 WO 2012164666A1
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WO
WIPO (PCT)
Prior art keywords
information
access device
company
external access
power line
Prior art date
Application number
PCT/JP2011/062406
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English (en)
Japanese (ja)
Inventor
本岡　茂哲
昌也 藤本
Original Assignee
株式会社メガチップス
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社メガチップス filed Critical 株式会社メガチップス
Priority to PCT/JP2011/062406 priority Critical patent/WO2012164666A1/fr
Publication of WO2012164666A1 publication Critical patent/WO2012164666A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
    • H04L9/0866—Generation of secret information including derivation or calculation of cryptographic keys or passwords involving user or device identifiers, e.g. serial number, physical or biometrical information, DNA, hand-signature or measurable physical characteristics

Definitions

  • the present invention relates to an information collection system using a power line communication network.
  • Collecting and analyzing the usage of each house, such as electricity, gas, and water, is beneficial for forecasting demand for these resources and ensuring a stable supply of resources. Alternatively, it is possible to contribute to environmental protection by adjusting and suppressing the usage of these resources.
  • Information on the amount of electricity, gas, water, etc. used can be analyzed to some extent through monthly meter reading work.
  • the work of the person in charge going around each house and checking the meter is very laborious and costly.
  • the acquired usage information is an aggregate value for each month, it is not possible to grasp the transition of the usage in real time, and it is impossible to perform demand prediction and adjustment of the usage in real time.
  • Patent Document 1 discloses a system that collects gas usage information using the Internet.
  • the information terminal installed in the house is authenticated by the first server that is the equipment of the information providing company, and accesses the second server that is the equipment of the gas company via the first server.
  • Patent Document 1 as described above, by constructing a mechanism for accessing each supplier company's server via the first server, the first server collectively performs an authentication process for accessing each supplier company's server. Can be executed. However, the information of each supplier company flows between the information terminal installed in each house and the first server, but the confidentiality of the information is not considered.
  • An information collection system of the present invention includes a power line communication network, an information collection terminal connected to the power line communication network, and an external access device connected to the power line communication network.
  • the information collection terminal is decoded by the external access device.
  • a transmission unit that transmits a communication packet including notification information encrypted by the first encryption method impossible and access information encrypted by the second encryption method that can be decrypted by the external access device, to the external access device;
  • the external access device includes a transfer unit that decrypts the access information included in the received communication packet and transfers the notification information encrypted by the first encryption method to the outside according to the decrypted access information.
  • the present invention also relates to an external access device connected to a power line communication network.
  • the external access device of the present invention includes: notification information encrypted by the first encryption method that cannot be decrypted by the external access device; and access information encrypted by the second encryption method that can be decrypted by the external access device.
  • a receiving unit that receives a communication packet from an information collection terminal connected to the power line communication network, and an access that decrypts the access information included in the received communication packet and decrypts the notification information encrypted by the first encryption method.
  • a transfer unit that transfers the information to the outside according to the information.
  • the external access device discards the decrypted access information after transferring the notification information to the outside.
  • the information collection terminal collects information measured by the measurement terminal, including information on the power consumption in the facility where the power line communication network is constructed.
  • various measurement information in the facility can be grasped in real time, including information on the power consumption in the facility. It is also possible to make use of the power consumption information for power demand prediction and usage adjustment planning from the viewpoint of environmental protection.
  • An object of the present invention is to provide a technique for maintaining the confidentiality of information in a system in which information held by various companies and collected information flow in the same communication network and are processed in a common device. It is.
  • 1 is an overall view of an information collection system including a power line communication network. It is a functional block diagram of a master terminal. It is a functional block diagram of a measurement terminal. It is a functional block diagram of an external access device. It is a block diagram of a communication packet. It is a figure which shows the production
  • FIG. 1 is a diagram showing an information collection system according to the present embodiment.
  • This information collection system includes a power line communication network 20 provided in the house 10, an Internet 50, an A company server 60A, a B company server 60B, and a C company server 60C connected to the Internet 50.
  • the company A server 60A, the company B server 60B, and the company C server 60C are collectively referred to as the server 60.
  • the power line communication network 20 is a network that performs power line communication (PLC: Power Line Communications) using the power line 21 provided in the house 10.
  • PLC Power Line Communications
  • a company A master terminal 31A, a company B master terminal 31B, and a company C master terminal 31C are connected to the power line 21.
  • the company A master terminal 31 ⁇ / b> A is a terminal installed by a power company that supplies power to the house 10.
  • the B company master terminal 31 ⁇ / b> B is a terminal installed by a gas company that supplies gas to the house 10.
  • the company C master terminal 31 ⁇ / b> C is a terminal installed by a water company that supplies water to the house 10.
  • the functions and configurations common to the A company master terminal 31A, the B company master terminal 31B, and the C company master terminal 31C will be collectively referred to as the master terminal 31.
  • the company A measuring terminal 32A, the company B measuring terminal 32B, and the company C measuring terminal 32C are connected to the power line 21.
  • the company A measurement terminal 32A is a terminal installed by the company A, and acquires information on the power consumption of home appliances in the house 10.
  • the B company measurement terminal 32B is a terminal installed by the B company, and acquires information such as the amount of gas used in the house 10.
  • the company C measurement terminal 32C is a terminal installed by the company C, and acquires information on the amount of water used in the house 10.
  • the functions and configurations common to the A company measuring terminal 32A, the B company measuring terminal 32B, and the C company measuring terminal 32C will be collectively referred to as the measuring terminal 32.
  • FIG. 1 two A company measuring terminals 32A and 32A in the house 10 are shown.
  • One company A measuring terminal 32A is connected to the television 41-1, and measures the power consumption of the television 41-1.
  • Another A company measuring terminal 32A is connected to the refrigerator 41-2 and measures the power consumption of the refrigerator 41-2.
  • two home appliances, the television 41-1 and the refrigerator 41-2, are illustrated, but in practice, the measurement terminal 32 is connected to all home appliances in the house 10 or all home appliances with high power consumption. By doing so, it becomes possible to grasp
  • the figure also shows two B company measuring terminals 32B and 32B in the house 10.
  • One company B measuring terminal 32B is connected to the gas leak sensor 41-3 and acquires output information of the gas leak sensor 41-3.
  • Another B company measuring terminal 32B is connected to the gas meter 41-4 and acquires information on the amount of gas used.
  • the figure shows one C company measuring terminal 32C in the house 10.
  • the company C measuring terminal 32C is connected to the water flow meter 41-5 and acquires information on the amount of water used.
  • the C company measurement terminal 32C may be connected to the water leak sensor.
  • the TV 41-1, the refrigerator 41-2, the gas leak sensor 41-3, the gas meter 41-4, and the water flow meter 41-5 are collectively referred to as the device 41.
  • an external access device 35 is connected to the power line 21.
  • the external access device 35 is connected to the Internet 50.
  • Each company's master terminals 31 A to 31 C can be connected to the Internet 50 via the external access device 35.
  • the external access device 35 is directly connected to the Internet 50. That is, although the external access device 35 has a built-in router function and is connected to the Internet via an optical cable, an ADSL line, a dedicated line, etc., other forms may be used. For example, a mode in which a modem is connected to the external access device 35 and connected to the Internet 50 via a telephone line may be employed. Alternatively, the external access device 35 may be connected to the Ethernet (registered trademark) provided in the house 10 and connected to the Internet 50 via a router connected to the Ethernet (registered trademark).
  • Ethernet registered trademark
  • the company A acquires information on the power consumption in the house 10 and aggregates the acquired information at the company A master terminal 31A.
  • the company A master terminal 31 ⁇ / b> A can notify the company A server 60 ⁇ / b> A of the total information via the external access device 35.
  • the company B acquires information on the amount of gas used in the house 10 and gas leakage information, and totals the acquired information at the company B master terminal 31B. Then, the B company master terminal 31B can notify the B company server 60B of the total information via the external access device 35.
  • the company C acquires information on the amount of water used in the house 10 and totals the acquired information at the company C master terminal 31C. Then, the C company master terminal 31C can notify the total information to the C company server 60C via the external access device 35.
  • FIG. 2 is a functional block diagram of the master terminal 31.
  • the master terminal 31 is a terminal having a power line carrier communication function.
  • the master terminal 31 includes a control unit 311 and a power line communication unit 312.
  • the control unit 311 includes a CPU, a memory, and the like, and performs overall control of the master terminal 31.
  • the control unit 311 executes processing for generating a communication packet 70 described later from information collected from the measurement terminal 32, processing for transmitting the communication packet 70 to the external access device 35, and the like.
  • the power line communication unit 312 is connected to the power line 21 and performs power line carrier communication.
  • the power line communication unit 312 communicates with the measurement terminal 32 and the external access device 35.
  • the power line communication unit 312 also supplies the power supplied from the power line 21 to the master terminal 31.
  • FIG. 3 is a functional block diagram of the measurement terminal 32.
  • the measurement terminal 32 has a power line carrier communication function and an information collection function for the device 41.
  • the measurement terminal 32 includes a control unit 321, a power line communication unit 322, and an information acquisition unit 323.
  • the control unit 321 includes a CPU, a memory, and the like, and performs overall control of the measurement terminal 32.
  • the control unit 321 executes processing for transmitting the information on the device 41 collected by the information acquisition unit 323 to the master terminal 31.
  • the power line communication unit 322 is connected to the power line 21 and performs power line carrier communication.
  • the power line communication unit 322 communicates with the master terminal 31 and the external access device 35.
  • the power line communication unit 322 also supplies power supplied from the power line 21 to the measurement terminal 32.
  • the information acquisition unit 323 is connected to the device 41 and acquires various information from the device 41.
  • the information acquisition unit 323 is also connected to the power line 21 via the power line communication unit 322, and can supply the power supplied from the power line 21 to the device 41.
  • the information acquisition unit 323 supplies power to the television 41-1 or the refrigerator 41-2, and the television 41-1 or the refrigerator 41-2. Measure power consumption. The information acquisition unit 323 notifies the control unit 321 of information on the measured power consumption.
  • the information acquisition unit 323 acquires the sensing information of the gas leak sensor 41-3.
  • the information acquisition unit 323 acquires information on the amount of gas used from the gas meter 41-4.
  • the information acquisition unit 323 notifies the control unit 321 of the acquired information.
  • the information acquisition unit 323 acquires water usage information.
  • the information acquisition unit 323 notifies the control unit 321 of the acquired information.
  • the measurement terminal 32 has a power line carrier communication function and a function of acquiring information of the device 41. Furthermore, the measurement terminal 32 has a function of supplying power to the device 41. However, when the device 41 is the gas leak sensor 41-3, the gas meter 41-4, and the water flow meter 41-5, the measurement terminal 32 may not have the power supply function.
  • the information acquisition unit 323 has been described as being connected to the device 41, the connection form between the information acquisition unit 323 and the device 41 can take various forms.
  • the information acquisition unit 323 and the device 41 are connected by a power line in order to supply power to the device 41 and measure the power consumption.
  • the information acquisition unit 323 has a wired or wireless communication function to acquire sensing information and measurement information of the devices 41-3, 41-4, and 41-5. It may be a form to do.
  • FIG. 4 is a functional block diagram of the external access device 35.
  • the external access device 35 includes a control unit 351, a power line communication unit 352, a unique key storage unit 353, an individual key storage unit 354, and an external communication unit 355.
  • the control unit 351 includes a CPU, a memory, and the like, and performs overall control of the external access device 35.
  • the control unit 351 executes processing for receiving the communication packet 70 from the master terminal 31, processing for decrypting the encrypted communication packet 70, processing for transferring external notification information to the server 60, and the like. Further, the control unit 351 executes processing for generating individual keys for each company, which will be described later.
  • the power line communication unit 352 is connected to the power line 21 and performs power line carrier communication.
  • the power line communication unit 352 communicates with the master terminal 31.
  • the power line communication unit 352 also supplies power supplied from the power line 21 to the external access device 35.
  • the external communication unit 355 has a function of connecting to the Internet 50.
  • the power line communication network 20 includes terminals 31 and 32 of different companies A, B, and C in a mixed manner.
  • the terminals 31 and 32 of these different companies use the power line 21 as a common communication medium.
  • the measurement terminal 32 of each company measures and acquires the information regarding the supply resource of each company.
  • the information measured and acquired by the measurement terminals 32 of each company is aggregated at the master terminal 31 of each company and notified to the server 60 of each company via the common external access device 35.
  • Each company's server 60 aggregates information such as the amount of power, gas, and water usage for each customer and manages them in a database. Thereby, each company can grasp
  • the master terminal 31 of the house 10 includes a monitor (not shown), and the usage status of power, gas, water, etc. can be displayed on the monitor.
  • the master terminal 31 has a function of calculating an electricity charge, a gas charge, a water charge, and the like from the usage amount of electric power, gas, water, etc., and displaying each charge in real time. Thereby, the user can grasp
  • FIG. By providing such a mechanism, each household can make a use plan from the viewpoint of resource saving and environmental protection.
  • FIG. 5 is a diagram showing a packet configuration of a communication packet 70 generated in the master terminal 31 and transmitted to the external access device 35.
  • the communication packet 70 includes a header 71, an external access information unit 72, and an external notification information unit 73.
  • the header 71 includes each company identification number. That is, the numbers for uniquely identifying the A company, the B company, and the C company are described. This information does not need to be kept confidential. For example, an identification number such as “1” is assigned to company A, “2” to company B, and “3” to company C.
  • the external access information section 72 includes information for connecting to the server 60.
  • the IP address and telephone number of the company A server 60A are described.
  • the external notification information section 73 describes information that is aggregated by the master terminal 31 and notified to the server 60. For example, if it is the communication packet 70 produced
  • the header 71 is not encrypted. Therefore, the external access device 35 can acquire each company identification number without decrypting the received communication packet 70.
  • the communication packets 70 of the respective companies flow through the common power line 21, but since the identification numbers of the respective companies are not particularly required to be confidential, information is not encrypted.
  • the external notification information unit 73 is encrypted by a proprietary encryption method of each company.
  • This encryption method an encryption method that can be independently selected by Company A, Company B, and Company C can be used. Of course, a private encryption method is used by others.
  • company A, company B, and company C encrypt the external notification information unit 73 using their own encryption keys KA, KB, and KC, respectively.
  • the external access device 35 cannot decrypt the external notification information unit 73 encrypted using the encryption key KX.
  • the individual key CX of each company is a private key to other companies. For this reason, the external access information of each company is not referred to by other companies. Thereby, the confidentiality of the access information to each company server 60 is ensured.
  • the individual key CX of each company can be decrypted in the external access device 35.
  • the external access device 35 can acquire the external access information and transfer the external notification information of each company to the server 60 of each company.
  • FIG. 6 and 7 are diagrams showing a process for generating the individual key CX.
  • the external access device unique key P is generated using the master key and the MAC address of the external access device 35 as input information.
  • AES Advanced Encryption Standard
  • AES Advanced Encryption Standard having a key length of 128 bits is used as an encryption method.
  • the master key is a key that is secretly managed by the manufacturer of the external access device 35.
  • a unique key P uniquely determined for each external access device is generated.
  • This unique key P is stored in the unique key storage unit 353 of the external access device 35. That is, the external access device unique key P is stored in the unique key storage unit 353 at the manufacturing stage of the external access device 35. Since the master key is secretly managed, this unique key P cannot be generated by an outsider.
  • each company individual key CX is generated using the unique key P and “each company identification number and time information” as input information.
  • AES having a key length of 128 bits is used as an encryption method.
  • the individual key CX is generated in the external access device 35 in response to a generation request from the master terminal 31.
  • the generated individual key CX is transferred to the master terminal 31 via the power line communication network 20.
  • the master terminal 31 stores the received individual key CX in the memory.
  • the external access device 35 stores the generated individual key CX in the individual key storage unit 354.
  • time information is further used as input information.
  • the time information is date information when the individual key CX is generated.
  • the individual key CX cannot be duplicated substantially.
  • the communication packet 70 of each company flows on the common power line 21 and the communication packet 70 of each company is processed in the common external access device 35, but each company cannot refer to the external access information of other companies. Further, since the external notification information is encrypted with the individual key CX together with the encryption key KX unique to each company, the confidentiality of the measurement and acquisition information of each company is strictly maintained.
  • home appliances such as the television 41-1 and the refrigerator 41-2 are used in the house 10. Electric power is supplied to these home appliances via the company A measuring terminal 32A, and the information acquisition unit 323 measures the power consumption.
  • the company A measuring terminals 32A and 32A transmit information on the measured power consumption to the company A master terminal 31A.
  • the company A master terminal 31A aggregates the power consumption in the house 10 based on the measurement information received from the company A measurement terminals 32A and 32A, and generates information to be reported to the company A server 60A.
  • the generated information is embedded in the communication packet 70 as the external notification information unit 73.
  • the external notification information unit 73 is encrypted with the encryption key KA unique to the company A.
  • the access information of the company A server 60A is embedded in the communication packet 70 as the external access information unit 72.
  • the external access information unit 72 and the external notification information unit 73 are encrypted with the individual key CA of the company A.
  • a communication packet 70 is transmitted to the external access device 35 as shown in FIG.
  • the external access device 35 refers to the header 71 to recognize that the communication packet 70 is the communication packet 70 of company A. Therefore, the external access device 35 decrypts the external access information unit 72 and the external notification information unit 73 using the individual key CA of company A, and acquires external access information.
  • the external access device 35 uses the acquired external access information to access the A company server 60A via the Internet 50 and transfers the external notification information section 73 to the A company server 60A.
  • the external notification information unit 73 is encrypted with the encryption key KA unique to the company A, so the confidentiality of the information is maintained.
  • the external access device 35 discards it without saving it in the memory. As a result, there is no room for the possibility of unauthorized use of external access information.
  • the information collection system of the present embodiment can reduce system construction costs by sharing a common power line communication network 20 among a plurality of different companies. Moreover, the network system constructed in the house 10 can be simplified.
  • the format of the communication packet 70 is made common as shown in FIG. 5, so that the communication process and protocol can be made common, and the information collection system Reduction of construction cost and high expandability can be maintained.
  • this information collection system may be used by a security company to collect security system information.
  • the measurement terminal 32 can communicate with various sensors, acquire sensing information, and transfer the information to a security company server. This eliminates the need for security companies to lay dedicated lines in each house. Since the power line 21 is stretched everywhere in the house 10, it is convenient for collecting information from sensors installed in various places in the house 10. Further, by making it possible to refer to the security information in the house 10 with a terminal such as a mobile phone via the Internet 50, it is possible to provide a more convenient system.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Telephonic Communication Services (AREA)
  • Selective Calling Equipment (AREA)

Abstract

Le problème à résoudre dans le cadre de la présente invention consiste à proposer une technologie destinée à garder la confidentialité des informations dans un système dans lequel des informations détenues et recueillies par diverses sociétés circulent à travers le même réseau de communication. Les terminaux maîtres (31A à 31C) et les terminaux de mesure (32A à 32C) des sociétés A à C sont raccordés à un réseau de communication sur courants porteurs (20). Le terminal de mesure (32) de chaque société transmet au terminal maître (31) de chaque société des informations recueillies à partir d'un appareil (41). Les terminaux maîtres (31) transmettent à un dispositif d'accès externe (35) des paquets de communication qui contiennent les informations recueillies. Les informations d'accès contenues dans les paquets de communication sont cryptées avec une clé distincte (CX) pour chaque société et les informations de notification externe sont cryptées avec une clé (KK) qui est unique pour chaque société et sont, ensuite, cryptées à l'aide de la clé distincte (CX) pour chaque société. Un dispositif d'accès externe (35) qui a reçu un paquet de communication, décrypte les informations d'accès à l'aide de la clé (CX) et transmet les informations de notification externe cryptées avec la clé (KK) de chaque société selon les informations d'accès.
PCT/JP2011/062406 2011-05-30 2011-05-30 Système de collecte d'informations et dispositif d'accès externe WO2012164666A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111932852A (zh) * 2020-07-17 2020-11-13 深圳市燃气集团股份有限公司 一种基于国密算法的燃气抄表系统及其燃气数据传输方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010049334A (ja) * 2008-08-19 2010-03-04 Mega Chips Corp 情報収集システムおよび外部アクセス装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010049334A (ja) * 2008-08-19 2010-03-04 Mega Chips Corp 情報収集システムおよび外部アクセス装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111932852A (zh) * 2020-07-17 2020-11-13 深圳市燃气集团股份有限公司 一种基于国密算法的燃气抄表系统及其燃气数据传输方法
CN111932852B (zh) * 2020-07-17 2021-05-25 深圳市燃气集团股份有限公司 一种基于国密算法的燃气抄表系统及其燃气数据传输方法

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