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    Smart meter, supply control method, operating method, integrated circuit, system, and program
    2.
    发明授权
    Smart meter, supply control method, operating method, integrated circuit, system, and program 有权
    智能仪表，电源控制方式，运行方式，集成电路，系统和程序

    公开(公告)号：US09583978B2

    公开(公告)日：2017-02-28

    申请号：US14813196

    申请日：2015-07-30

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Hideki Matsushima ,  Natsume Matsuzaki ,  Tomoyuki Haga

    IPC: H02J4/00 ,  H02J13/00 ,  G01D4/00

    CPC classification number: H02J13/0079 ,  G01D4/004 ,  Y02B90/242 ,  Y02B90/244 ,  Y04S20/322 ,  Y04S20/327 ,  Y10T307/549 ,  Y10T307/696 ,  Y10T307/944

    Abstract: A smart meter includes: a power supply control unit which causes stoppage of a supply of power passing through the smart meter to an television and so on, when an RD command to stop the supply is received; a first communication unit which performs a first communication through which the RD command is received; a second communication unit which performs a second communication; and a communication control unit which: causes the performance of the first communication before the RD command is received; and prohibit the performance of the first communication and cause only the performance of the second communication, after the RD command is received.

    Abstract translation: 智能电表包括：当接收到停止供电的RD命令时，电源控制单元使得通过智能电表的电力供应停止到电视机等等; 第一通信单元，其执行接收到RD命令的第一通信; 执行第二通信的第二通信单元; 以及通信控制单元，其在接收到RD命令之前使所述第一通信的执行; 并且在接收到RD命令之后禁止执行第一通信并且仅引起第二通信的执行。

    Authentication method, authentication system, and controller
    3.
    发明授权
    Authentication method, authentication system, and controller 有权

    公开(公告)号：US10440021B2

    公开(公告)日：2019-10-08

    申请号：US15358283

    申请日：2016-11-22

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Yuji Unagami ,  Manabu Maeda ,  Tomoki Takazoe ,  Yoichi Masuda ,  Hideki Matsushima

    IPC: H04L9/00 ,  H04L29/06 ,  H04L9/14 ,  H04L9/30 ,  H04L9/32 ,  G06F21/44 ,  H04L9/08

    Abstract: A first controller generates a first group key, executes first mutual authentication with devices within a group, and shares a first group key with devices that have succeeded in authentication. At least one controller within the group decides a coordinator that manages a group key used in common in the group, from controllers including a second controller newly joined in the group. The first controller executes second mutual authentication with the coordinator, and shares the first group key with the coordinator. The coordinator performs encrypted communication within the group using the first group key. The coordinator generates a second group key when valid time of the first group key is equal to or smaller than a predetermined value, executes third mutual authentication with the devices and controllers within the group, and updates the group key of the devices and controllers that have succeeded in authentication to the second group key.

    Authentication method, authentication system, and controller
    8.
    发明授权
    Authentication method, authentication system, and controller 有权

    公开(公告)号：US10992667B2

    公开(公告)日：2021-04-27

    申请号：US16552445

    申请日：2019-08-27

    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

    Inventor： Yuji Unagami ,  Manabu Maeda ,  Tomoki Takazoe ,  Yoichi Masuda ,  Hideki Matsushima

    IPC: H04L9/30 ,  H04L29/06 ,  G06F21/44 ,  H04L9/08 ,  H04L9/32 ,  H04L9/14

    Abstract: A first controller generates a first group key, executes first mutual authentication with devices within a group, and shares the first group key with the devices that have succeeded in first mutual authentication. When a second controller joins the group, the first controller decides a coordinator that manages a group key used in common in the group. The first controller executes second mutual authentication with the coordinator, and shares the first group key with the coordinator when the second mutual authentication is successful. The coordinator performs encrypted communication within the group using the first group key, generates a second group key when valid time of the first group key is equal to or smaller than a predetermined value, executes third mutual authentication with the devices and a third controller, and updates the first group key of the devices and the third controller that have succeeded in the third authentication.

    Authentication method, authentication system, and controller
    9.
    发明授权
    Authentication method, authentication system, and controller 有权

    公开(公告)号：US10951400B2

    公开(公告)日：2021-03-16

    申请号：US16511293

    申请日：2019-07-15

    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

    Inventor： Yuji Unagami ,  Manabu Maeda ,  Hideki Matsushima ,  Tomoki Takazoe ,  Yoichi Masuda

    IPC: H04L9/00 ,  H04L9/08 ,  G06F21/44 ,  H04L29/06 ,  H04Q9/00 ,  H04L9/06 ,  H04L9/32

    Abstract: An authentication method for a group of devices connected to a network includes selecting the first controller as a coordinator, the coordinator being configured to manage a group key to be used in common in the group. The method includes generating the group key, and performing first mutual authentication and second mutual authentication. The method also includes sharing the group key with each device for which the first mutual authentication has been successful, and sharing the group key with each second controller for which the second mutual authentication has been successful. The method further includes encrypting transmission data by using the group key to generate encrypted data, generating, authentication data by using the group key, and simultaneously broadcasting a message to each device for which the first mutual authentication has been successful and each second controller for which the second mutual authentication has been successful.

    Controller, communication method, and communication system
    10.
    发明授权
    Controller, communication method, and communication system 有权

    公开(公告)号：US10764275B2

    公开(公告)日：2020-09-01

    申请号：US15753148

    申请日：2016-08-04

    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

    Inventor： Tomoki Takazoe ,  Yoichi Masuda ,  Hideki Matsushima ,  Yuji Unagami

    IPC: G06F7/04 ,  G06F15/16 ,  H04L29/06 ,  H04L9/08 ,  H04L9/14 ,  H04L9/32 ,  G06F21/44

    Abstract: A new controller (supporting device authentication) is a controller which performs encrypted communication with a device which has succeeded in mutual authentication using an electronic certificate, and the controller includes: a determining unit that determines whether or not a communication target device with which communication is to be performed is an authentication support device that supports the mutual authentication; a functional restriction unit that, when the communication target device is determined not to be the authentication support device by the determining unit, imposes a functional restriction on one or more functions of the communication target device which are operable by the new controller (supporting device authentication); and a communication unit which performs communication in plain text with the communication target device with the functional restriction imposed by the functional restriction unit.

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