-
公开(公告)号：US20210320921A1
公开(公告)日：2021-10-14
申请号：US17264237
申请日：2019-07-01
Inventor： Yoichi MASUDA , Kenji KURAMAE , Masao AKIMOTO
IPC: H04L29/06
Abstract: The communication system is a communication system including a management communication apparatus, a first communication apparatus, and a second communication apparatus. The first communication apparatus is capable of communicating using a plurality of Internet Protocol (IP) addresses in different versions from each other, and includes a first communication unit configured to notify the management communication apparatus of a first IP address among the plurality of IP addresses in a first authentication process for entering the communication system, and to notify the management communication apparatus of a second IP address among the plurality of IP addresses after the first authentication process, the first authentication process being performed between the first communication apparatus and the management communication apparatus.
-
公开(公告)号：US20200064816A1
公开(公告)日：2020-02-27
申请号：US16489225
申请日：2018-02-19
Inventor： Kenji YASU , Yoichi MASUDA
Abstract: A control device is a control device in a control system in which the control device connected via a network to a server in which an appliance and a user's smartphone assigned to control the appliance are stored in association with each other receives an instruction from the user's smartphone and controls an operating condition of an appliance. The control device determines whether a signal received from a different terminal satisfies a predetermined criterion. If the control device determines that the signal satisfies the predetermined criterion, the control device cuts off all communications via the network.
-
公开(公告)号：US20200036536A1
公开(公告)日：2020-01-30
申请号：US16500604
申请日：2018-04-11
Inventor： Yoichi MASUDA , Tomoki TAKAZOE
IPC: H04L9/32
Abstract: An HEMS controller receives a certificate revocation list distributed from a certificate authority server and listing serial numbers of revoked electronic certificates. The serial number of the electronic certificate includes a first identifying part that indicates a value for identifying a type of a participation node maintaining the electronic certificate and a second identifying part that indicates a value for identifying an individual participation node. In the case the certificate revocation list includes a serial number in which the second identifying part is a predetermined value, the HEMS controller determines that the electronic certificate of a participation node that meets the type indicated by the first identifying part of the serial number is invalid.
-
公开(公告)号：US20200252390A1
公开(公告)日：2020-08-06
申请号：US16741720
申请日：2020-01-13
Inventor： Yoichi MASUDA , Tomoki TAKAZOE
IPC: H04L29/06
Abstract: A HEMS controller receives, from each of a plurality of devices requesting registration in a HEMS, an electronic certificate of the device in a continuous registration mode in which a plurality of devices can be continuously registered in the HEMS. The HEMS controller 14 determines whether or not to permit registration in the HEMS for each device based on an attribute indicated by the electronic certificate of each of the plurality of devices.
-
公开(公告)号：US20190342086A1
公开(公告)日：2019-11-07
申请号：US16511293
申请日：2019-07-15
Inventor： Yuji UNAGAMI , Manabu MAEDA , Hideki MATSUSHIMA , Tomoki TAKAZOE , Yoichi MASUDA
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.
-
Patent Agency Ranking
公开(公告)号：US20170118585A1
公开(公告)日：2017-04-27
申请号：US15317344
申请日：2015-05-20
Inventor： Naohiro FUKUDA , Kenji YASU , Yoichi MASUDA
CPC classification number: H04W4/80 , G06F3/023 , G06F3/147 , G06F21/44 , G08C2201/20 , G09G2370/16 , G09G2370/22 , H04L29/08 , H04Q9/00 , H04W76/11
Abstract: In a communication system including: a control apparatus which controls pairing for communication according kinds of pairing methods; and devices each of which performs pairing for communication according to one or more predetermined kinds of pairing methods, and performs encryption communication with the control apparatus by pairing with the control apparatus, wherein the control apparatus includes: a kind obtaining unit which obtains, from each device, the predetermined kinds of pairing methods for the device; a combination determining unit which determines, for each device, a combination of a same kind of pairing methods included in both the plurality of kinds of pairing methods for the control apparatus and the predetermined kinds of pairing methods obtained by the kind obtaining unit; and a display unit which displays, to a user, the combination of the same kind of pairing methods determined by the combination determining unit according to a predetermined condition.
-
公开(公告)号：US20190386989A1
公开(公告)日：2019-12-19
申请号：US16552445
申请日：2019-08-27
Inventor： Yuji UNAGAMI , Manabu MAEDA , Tomoki TAKAZOE , Yoichi MASUDA , Hideki MATSUSHIMA
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.
-
公开(公告)号：US20160044612A1
公开(公告)日：2016-02-11
申请号：US14773598
申请日：2014-02-21
Inventor： Naotake YAMAMOTO , Yoichi MASUDA , Tetsuya HISHIKAWA
CPC classification number: H04W52/42 , H04B7/0608 , H04B7/061 , H04W4/70 , H04W52/367 , Y02D70/00
Abstract: A wireless communication device has an aim of specifying, when transmitting data to another communication device, an antenna among antennas that can transmit data at a low transmission power. The wireless communication device switches between a first antenna and a second antenna upon transmission of a request signal to the other communication device, and increases or decreases transmission power for transmitting the request signal when switching between the first antenna and the second antenna.
Abstract translation: 无线通信装置的目的是在向另一通信装置发送数据时，指定能够以低发送功率发送数据的天线之中的天线。 无线通信设备在向其他通信设备发送请求信号时，在第一天线和第二天线之间进行切换，并且当在第一天线和第二天线之间切换时，增加或减少用于发送请求信号的发送功率。
-
公开(公告)号：US20210392000A1
公开(公告)日：2021-12-16
申请号：US17270378
申请日：2019-05-10
Inventor： Tomoki TAKAZOE , Yoichi MASUDA , Kenji YASU , Yuji UNAGAMI
Abstract: A GM acquires a first certificate revocation list designating revoked public key certificates and distributed from a certificate authority server. The GM generates a second certificate revocation list produced by extracting information on a plurality of home electric appliances from the first certificate revocation list. The GM restricts communication with a device for which the public key certificate is revoked, by distributing the second certificate revocation list generated to the plurality of home electric appliances.
-
公开(公告)号：US20180241739A1
公开(公告)日：2018-08-23
申请号：US15753148
申请日：2016-08-04
Inventor： Tomoki TAKAZOE , Yoichi MASUDA , Hideki MATSUSHIMA , Yuji UNAGAMI
CPC classification number: H04L63/0823 , G06F21/44 , G06F21/445 , H04L9/08 , H04L9/14 , H04L9/32 , H04L9/3263 , H04L63/0869 , H04L63/0876 , H04L63/102
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.
-
-
-
-
-
-
-
-
-
Search Results
11
records
(took 0.014 seconds)
