Nippon Telegraph and Telephone Corporation

Shingo Kashima

Hiroki Nagayama

Masaki Tanikawa

Tetsuhiko Murata

Tsuyoshi Kondo

Yukio Nagafuchi

Iifan Tyou

Koki Nomura

Kenji Ota

Akio Mukaiyama

Kazunori Kamiya

Bo Hu

Takahiro Nukushina

Koji Morishita

Takuya Saeki

Masami Ueno

A communication terminal apparatus includes processing circuitry configured to collect communication of an application and control the communication of the application based on a first control condition, analyze the communication collected to determine whether the application is a communication control target, and generate the first control condition based on a normal communication range of the application that is the communication control target, and transmit at least a part of first shared information including identification information about the application and the first control condition to a second communication terminal apparatus that is different from the communication terminal apparatus.

Communication terminal device, communication control method, and communication control program

An aggregation unit () aggregates an input pulse train signal including a time-series pulse corresponding to a predetermined observation time into pulses for respective unit times. A calculation unit () calculates a time shift amount of an autocorrelation function using the aggregated pulse train signal. A detection unit () calculates an autocorrelation value and a threshold with respect to each of time shift amounts selected in ascending order from the calculated time shift amount and detects the time shift amount as a period of the aggregated pulse train signal when the autocorrelation value exceeds the threshold. A conversion unit () converts the detected period to a period of the input pulse train signal using the unit time. An exclusion unit () excludes the pulse train signal having the converted period from the input pulse train signal.

Estimation device, estimation method and estimation program

A period estimation apparatus includes processing circuitry configured to extract candidate periods being a target of period determination from an input pulse train, use at least one of the candidate periods extracted to determine whether the at least one of the candidate periods exists as an actual period, and, when determining that the at least one of the candidate periods does not exist as the actual period, suspend the period determination for the at least one of the candidate periods, perform the period determination for the at least one of the candidate periods determined to exist as the actual period, generate a pseudo periodic pulse train, adjust, based on a differential value between the pseudo periodic pulse train generated and the input pulse train, a pulse position of the pseudo periodic pulse train, and detect a periodic pulse train according to results of the period determination and adjustment.

Pulse train signal cycle estimation device, pulse train signal cycle estimation method, and pulse train signal cycle estimation program

An extraction unitextracts predetermined pieces of information from each of a plurality of packets and sent from equipmentThen, an inference unitinfers a piece of equipment information that is information on the equipmentfor each of the plurality of packets on the basis of the pieces of information extracted by the extraction unitThen, the first selection unitselects a predetermined piece of equipment information for each packet type from among pieces of equipment information on the basis of a level of detail of each piece of equipment information. Then, the second selection unitselects, on the basis of a level of reliability predefined according to each packet type, a predetermined piece of equipment information corresponding to the equipmentfrom among pieces of equipment information inferred by the first selection unit

Estimation device, estimation method, and estimation program

A device estimating apparatus acquires one or more DNS queries transmitted from each device connected to a network and generates comparison source data in which each content of the acquired DNS queries is associated with one or more pieces of attribute information of each of the one or more devices that have transmitted the DNS queries having the content. Thereafter, when one or more DNS queries are acquired from an estimation target device, the device estimating apparatus reads, for each DNS query, attribute information of one or more devices associated with a content of the DNS query from the comparison source data and estimates an attribute of the estimation target device using the read attribute information.

Device estimation device, device estimation method, and device estimation program

A communication control apparatus includes a collection control unit, an analysis unit, and a coordination unit. The collection control unit collects communication performed with a device connected to a subordinate network, and controls communication performed by the device based on a first control condition; The analysis unit analyzes the communication collected by the collection control unit to extract device identification information indicating characteristics of the communication performed by the device. The analysis unit specifies a device name of the device and the first control condition corresponding to a normal communication range extracted from the device identification information, based on the device identification information. The coordination unit transmits at least part of first shared information in which the device name and the first control condition specified by the analysis unit and the device identification information are associated with each other, to an outside of the subordinate network.

Communication control apparatus, communication control method, and communication control program

A gateway device () stores therein a first filtering rule and a second filtering rule for filtering packets which are transmitted from a terminal () in a network () as a transmission source to a terminal () in a network () as a destination. The gateway device () acquires, on the basis of a packet transmitted from the terminal () in the network (), identification information for identifying the terminal (). The gateway device () notifies a management device () of the acquired identification information. The management device () generates a management screen on the basis of the notified information, and transmits the management screen to a display device (). The management device () transmits an instruction based on input to the display device () to the gateway device (). The gateway device () sets the first filtering rule on the basis of the instruction from the management device ().

Management system and management method

A cycle estimation device () includes: a candidate cycle extraction unit () which extracts a candidate cycle that is a cycle determination target from an input time-series pulse train; a pulse train shape analysis unit () which converts arrangement of the time-series pulse train into numerical values on the basis of the extracted candidate cycle and outputs a constant that adjusts a random noise threshold value of pulse repetition interval (PRI) conversion in response to an index indicating a degree of concentration of calculated numerical values; and a cycle detection unit () which executes PRI conversion using a value of the candidate cycle and the constant and performs cycle determination and cycle value detection.

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Musashino, Japan

Shingo Kashima