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1.发明授权公开(公告)号：US10673624B2
公开(公告)日：2020-06-02
申请号：US15443345
申请日：2017-02-27
Applicant: Kabushiki Kaisha Toshiba
Inventor： Yoshihiro Oba , Yoshikazu Hanatani
Abstract: A communication control device includes a receiving unit, a generating unit, and an output unit. The receiving unit receives input of a binary tree in which each leaf node has an index and a node key assigned thereto, and receives input of node IDs that, from among the leaf nodes, enable identification of the leaf nodes belonging to a group. The generating unit generates, using the node key assigned to the root node of each partial tree of the binary tree which includes only the leaf nodes identified by the node IDs, a cipher text by encrypting a group key shared in the group, and generates set information containing the generated cipher text. The output unit outputs the set information at least to the communication devices that are associated to the leaf nodes belonging to the group.
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公开(公告)号：US20160105774A1
公开(公告)日：2016-04-14
申请号：US14876013
申请日：2015-10-06
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Yusuke DOI , Yoshihiro Oba
CPC classification number: H04W4/06 , H04L12/1868 , H04W72/005 , H04W74/0808 , H04W84/18
Abstract: According to an embodiment, a transmission cancellation method includes setting, when a broadcast message is received, a waiting time randomized within a predetermined interval; reserving, in a case where a message which is deemed to be the same as the received message is not received for a predetermined number of times until the waiting time passes, transmission of the message by broadcasting, but not reserving, in a case where the message is received for the predetermined number of times, the transmission of the message by broadcasting; and cancelling the transmission of the message of which transmission is received, in a case where the message of which transmission is reserved is broadcast with timing of a broadcast time slot and a message which is deemed to be the same as the message of which transmission is reserved is received for the predetermined number of times.
Abstract translation: 根据实施例，传输消除方法包括：当接收到广播消息时，设置在预定间隔内随机化的等待时间; 在等待时间过去之前，在被认为与接收到的消息相同的消息没有被接收到预定次数的情况下，保留在通过广播而不是保留的消息的传输 接收预定次数的消息，通过广播发送消息; 并且在广播时隙的定时和被认为与发送的消息相同的消息的情况下广播发送被保留的消息的情况下，接收到发送的消息的发送; 预定次数被接收。
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公开(公告)号：US10715345B2
公开(公告)日：2020-07-14
申请号：US14589462
申请日：2015-01-05
Applicant: Kabushiki Kaisha Toshiba
Inventor： Yoshikazu Hanatani , Toru Kambayashi , Yoshihiro Oba
Abstract: According to an embodiment, a communication control device is connected to communication devices and includes a storage, a generator, and an output unit. The storage is configured to store group information containing a group ID of a group and device IDs of the communication devices belonging to the group. The generator is configured to generate compressed information in which the device IDs are compressed. The output unit is configured to output, when the group information is updated, to all communication devices identified by the device IDs included in the group information after updating and to a plurality of communication devices including one or more of the communication devices identified by the device IDs not included in the group information after updating, output information containing identification information for identifying the group after updating and compressed information in which the device IDs included in the group information after updating are compressed.
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公开(公告)号：US09363205B2
公开(公告)日：2016-06-07
申请号：US14198778
申请日：2014-03-06
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Yoshihiro Oba
IPC: H04L12/931
CPC classification number: H04L49/20
Abstract: A communication apparatus has an upper-layer evaluation parameter acquisition part configured to acquire an evaluation parameter for an upper-side layer among a plurality of layers included in a network, a fragment-size decision part configured to decide a fragment size to be used in dividing a packet that includes information of an upper-side layer into fragments, based on the evaluation parameter acquired by the upper-layer evaluation parameter acquisition part, and a fragment controller configured to divide the packet into a plurality of fragments based on the fragment size.
Abstract translation: 通信装置具有：上层评价参数获取部，被配置为获取网络中包含的多个层中的上侧层的评价参数，所述片段大小决定部被配置为确定要使用的片段大小 基于由上层评估参数获取部获取的评价参数，将包含上层信息的分组划分成片段，以及片段控制器，被配置为基于片段大小将该分组划分为多个片段 。
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公开(公告)号：US08898454B2
公开(公告)日：2014-11-25
申请号：US13670827
申请日：2012-11-07
Applicant: Kabushiki Kaisha Toshiba
Inventor： Yasuyuki Tanaka , Yoshihiro Oba
CPC classification number: H04L9/0822 , H04L9/0833 , H04L2463/061 , H04L2463/062 , H04W12/04 , H04W12/06
Abstract: There is provided a communication device in which a network access authenticating unit executes a network access authentication process with an authentication server to establish a connection to a network, the authentication process including generation of information shared with the authentication server, a communication unit receives an authentication result message from the authentication server when succeeding in the network access authentication process, the authentication result message containing an authentication result indicating success in the network access authentication process and an encrypted network key; a key transport key generating unit generates a key transport key by use of the information generated in the network access authentication process; and a network key acquiring unit acquires a network key by decrypting the encrypted network key contained in the authentication result message with the key transport key, the communication unit encrypts data with the network key and transmits encrypted data to the network.
Abstract translation: 提供了一种通信装置，其中网络访问认证单元与认证服务器执行网络访问认证处理以建立到网络的连接，所述认证过程包括生成与认证服务器共享的信息，通信单元接收认证 来自认证服务器的结果消息在成功进行网络接入认证处理时，认证结果消息包含表示网络接入认证过程成功的认证结果和加密网络密钥; 密钥传输密钥生成单元通过使用网络访问认证处理中生成的信息生成密钥传送密钥; 网络密钥获取单元通过利用密钥传输密钥对包含在认证结果消息中的加密网络密钥进行解密来获取网络密钥，通信单元用网络密钥加密数据，并将加密数据发送到网络。
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Patent Agency Ranking
公开(公告)号：US20140269771A1
公开(公告)日：2014-09-18
申请号：US14198778
申请日：2014-03-06
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Yoshihiro Oba
IPC: H04L12/931
CPC classification number: H04L49/20
Abstract: A communication apparatus has an upper-layer evaluation parameter acquisition part configured to acquire an evaluation parameter for an upper-side layer among a plurality of layers included in a network, a fragment-size decision part configured to decide a fragment size to be used in dividing a packet that includes information of an upper-side layer into fragments, based on the evaluation parameter acquired by the upper-layer evaluation parameter acquisition part, and a fragment controller configured to divide the packet into a plurality of fragments based on the fragment size.
Abstract translation: 通信装置具有：上层评价参数获取部，被配置为获取网络中包含的多个层中的上侧层的评价参数，所述片段大小决定部被配置为确定要使用的片段大小 基于由上层评估参数获取部获取的评价参数，将包含上层信息的分组划分成片段，以及片段控制器，被配置为基于片段大小将该分组划分为多个片段 。
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公开(公告)号：US10454910B2
公开(公告)日：2019-10-22
申请号：US15448131
申请日：2017-03-02
Applicant: Kabushiki Kaisha Toshiba
Inventor： Yoshikazu Hanatani , Yoshihiro Oba
Abstract: According to an embodiment, a management apparatus manages pieces of information held by a plurality of devices. The apparatus includes storage, one or more processors, and a transmitter. The storage stores therein the pieces of information held by the devices. The processors generate a list of inspection values indicating the pieces of information stored in the storage. The processors generate determination information for determining, in a state where the list is concealed, whether a provided value is included in the list. The transmitter transmits the determination information to the respective devices.
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公开(公告)号：US10440523B2
公开(公告)日：2019-10-08
申请号：US14672287
申请日：2015-03-30
Applicant: Kabushiki Kaisha Toshiba
Inventor： Yoshikazu Hanatani , Toru Kambayashi , Fangming Zhao , Yoshihiro Oba
Abstract: A communication control device includes an extracting and an output unit. One or more communication devices belong to a first-type group, and one or more communication devices belong to a second-type group. From a media key block containing a plurality of elements, the extracting unit extracts partial information containing an element which is processible by each communication device belonging to a subset of the second-type group. To the communication devices belonging to the second-type group that is identified by identification information corresponding to the partial information; the output unit outputs a group ID that indicates the first-type group, the identification information, and the partial information.
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公开(公告)号：US10103973B2
公开(公告)日：2018-10-16
申请号：US14751473
申请日：2015-06-26
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Takaomi Murakami , Yoshihiro Oba , Ren Sakata , Hiroki Kudo , Jumpei Ogawa
IPC: H04L12/707
Abstract: A communication device according to an embodiment is included in a multi-hop network. The communication device includes a holder, a storage, a switcher, and a controller. The holder holds communication data. The storage stores path information including an identifier that identifies a communication path and destination information that indicates a destination of communication data on the communication path. The switcher switches a communication path used to transmit communication data on the basis of the path information stored in the storage. The controller transmits communication data to a destination of a communication path switched by the switcher.
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公开(公告)号：US10069815B2
公开(公告)日：2018-09-04
申请号：US14301793
申请日：2014-06-11
Applicant: KABUSHIKI KAISHA TOSHIBA
Inventor： Yusuke Doi , Yoshihiro Oba
Abstract: There is a server apparatus in which: an issuing unit issues data to devices; a distribution manager distributes the data to devices; a data manager manages data set as issued; a revocation manager detects, from the data set, data that satisfies a condition, and invalidates the detected data; and a filter manager updates and distribute to devices a filter having a predetermined bit length each time data is invalidated, by setting one of a first value and a second value to each of bits in the filter when a revoked data set is projected onto the filter; the data manager identifies data other than the invalidated data, having projection onto at least one of bits whose value has changed between before and after the update, and having the first value for all of bits projected onto the updated filter and reissues data to the device having the identified data.
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