公开(公告)号：US20230049871A1

公开(公告)日：2023-02-16

申请号：US17792881

申请日：2020-01-28

Applicant: NEC Corporation

Inventor： Shohei MITANI

IPC: G06F11/34

Abstract: An event analysis support apparatus 1 includes: a belonging degree output unit 2 configured to output a belonging degree indicating a degree to which event information pertaining to an event occurring in a system belongs to each of a plurality of event types set in advance, a feature candidate information output unit 3 configured to output feature candidate information for each of the event types, using event information of an event that has newly occurred and feature information expressing a feature among events already generated for each of the event types; and a feature information output unit 4 configured to output new feature information for each of the event types using the feature information, the feature candidate information, and the belonging degree.

公开(公告)号：US20220075693A1

公开(公告)日：2022-03-10

申请号：US17419645

申请日：2019-01-16

Applicant: NEC Corporation

Inventor： Shohei MITANI ,  Satoru YAMANO

IPC: G06F11/14 ,  G06F17/18

Abstract: An estimation apparatus 1 includes: a correlation index estimation unit 2 configured to receive a variable output by a component 21 as an input, and estimate correlation index information indicating a range that a value of the variable and a correlation can take after a predetermined time, at a normal time; an abnormality degree calculation unit 3 configured to calculate an abnormality degree using the correlation index information; and a causal effect estimation unit 4 configured to estimate a causal effect expressing an index indicating that an abnormality propagates to a variable output by the component 21.

公开(公告)号：US20250119443A1

公开(公告)日：2025-04-10

申请号：US18567411

申请日：2021-06-10

Applicant: NEC Corporation

Inventor： Shohei MITANI ,  Hirofumi UEDA

IPC: H04L9/40 ,  G06F11/07 ,  G16Y40/10

Abstract: An anomaly cause estimation apparatus includes: an anomaly detection unit converts a data series acquired in a time series from a plurality of components provided in a target system into an anomaly level data series, and detects an anomaly based on the obtained anomaly level data series; and an anomaly propagation estimation unit inputs a target anomaly level data series, extracted from the anomaly level data series, for a period before a point in time at which the anomaly is detected, a target data series corresponding to the target anomaly level data series, and information indicating a causal relationship between the components to an anomaly propagation estimation model, and estimates an anomaly propagation likelihood of the anomaly propagating between the components.

公开(公告)号：US20240297903A1

公开(公告)日：2024-09-05

申请号：US18582972

申请日：2024-02-21

Applicant: NEC Corporation

Inventor： Nakul GHATE ,  Shohei MITANI ,  Hirofumi UEDA

IPC: H04L9/40

CPC classification number: H04L63/20 ,  H04L63/101 ,  H04L63/1433

Abstract: An access control system includes workload distribution control function that decides an access control granularity by analyzing dynamic risk factors in network system; and policy selection function that selects an access control policy corresponding to the access control granularity, from a core policy and distributes the selected access control policy toward filtering PEP (Policy Enforcement Point) controller and fine-grained PEP (Policy Enforcement Point) controller.

公开(公告)号：US20240249008A1

公开(公告)日：2024-07-25

申请号：US18413193

申请日：2024-01-16

Applicant: NEC Corporation

Inventor： Masaki INOKUCHI ,  Shohei MITANI

IPC: G06F21/62

CPC classification number: G06F21/62

Abstract: A policy consistency verification apparatus includes a policy conversion part configured to generate an If-Then rule approximating a policy function used as an input, wherein the policy function is generated from policy definition defining attribute value of access and a rule regarding accessibility to obtain an output of accessibility from inputs of the attribute value; and an error sample generation part configured to verify consistency between the If-Then rule and the policy definition to generate inconsistent attribute value as an error sample.

公开(公告)号：US20220279003A1

公开(公告)日：2022-09-01

申请号：US17631748

申请日：2019-08-09

Applicant: NEC Corporation

Inventor： Satoru YAMANO ,  Takashi KONASHI ,  Shohei MITANI

IPC: H04L9/40

Abstract: An anomaly detection apparatus 1 includes a period specification unit 2 that, at the time of learning, classifies learning packets by type, and, with use of a packet interval calculated for every packet type and a frequency indicating an incidence rate of the packet interval, specifies a period of the packet type, and a feature extraction unit 3 that extracts, based on the period, a sequence feature amount having sequence information indicating the order of the packet types and information indicating the time distribution between packets in the sequence information.

公开(公告)号：US20210400069A1

公开(公告)日：2021-12-23

申请号：US17285678

申请日：2018-10-29

Applicant: NEC Corporation

Inventor： Shohei MITANI ,  Satoru YAMANO

IPC: H04L29/06 ,  H04L12/24 ,  H04L12/26

Abstract: An information processing apparatus according to the present invention includes a generation unit configured to generate the allowable range of a possible value of data measured from a target system based on a model for predicting the data measured in the target system and the data having been measured from the target system; and a detection unit configured to detect the state of the target system based on the data measured from the target system and the allowable range.

公开(公告)号：US20190098609A1

公开(公告)日：2019-03-28

申请号：US16085640

申请日：2017-03-15

Applicant: NEC Corporation

Inventor： Shohei MITANI ,  Nobuhito TANIUCHI ,  Masaaki MARUYAMA

IPC: H04W72/04

Abstract: A communication control device comprises: a transmission unit which transmits, to each of a plurality of communication devices that perform communication using previously allocated communication resources, allocation information indicating the allocation of the communication resources to be used when the communication devices perform communication; and an intermediate state generation unit which, when the allocation of the communication resources to the respective communication devices is changed from a first allocation state to a second allocation state, generates an intermediate state indicating the allocation of the communication resources, on the basis of the first allocation state and the second allocation state, wherein the transmission unit transmits the allocation information to each of the communication devices such that the allocation changes from the first allocation state to the second allocation state via the intermediate state generated by the intermediate state generation unit.