Abstract: According to an aspect of an embodiment, a method for controlling an apparatus for transferring data from a plurality of first devices to a second device via a network, the data being transferred by using a packet, comprises the steps of: extracting type information identifying type of software conveyed by a packet and destination information identifying destination of the packet transmitted from one of the first devices; counting the number of kinds of the type information extracted from packets associated with the same destination information, respectively; and determining an unauthorized communication when the number of kinds of the type information is less than a predetermined value.

Abstract: An anti-worm program allows a computer to execute control of communication suspected as worm communication, the program allowing the computer to execute: a communication information acquisition step that acquires communication information which is information concerning communication from a target source; and a communication control step that has a control amount calculation formula for calculating the control amount of the communication from the target source using the communication information and performs control of the communication from the target source based on the communication control amount obtained using the control amount calculation formula.

Abstract: A communication detection method in which, based on a sender and a destination of communication data recorded in a communication log that records information concerning communication data exchanged between devices linked to a network, the communication log is divided into parts corresponding to individual object devices. The communication logs divided corresponding to the individual devices are analyzed so that the communication data in which a connection request to each device has been issued is extracted, and then a response success/failure table is generated based on whether a response from the device to the connection request has been detected; and based on the response success/failure table, when a time period that no response is obtained from the device satisfies a criterion condition determined in advance, it is determined that peer-to-peer communication has been performed.

Abstract: According to an aspect of an embodiment, a method for controlling an apparatus for transferring data from a plurality of first devices to a second device via a network, the data being transferred by using a packet, the method comprises the steps of: extracting encryption information identifying method of encryption conveyed by a packet and destination information identifying destination of the packet transmitted from one of the first devices; counting the number of kinds of the destination information extracted from packets associated with the same encryption information, respectively; and determining an unauthorized communication when the number of kinds of the encryption information is less than a predetermined value.

Abstract: In a system for providing software maintenance service, a server includes: a storage unit that stores a determination rule for determining whether to deny a process request to the faulty software; and a transmitting unit that transmits the determination rule to the client. The client includes: a determination-rule receiving unit that receives the determination rule; a process-request receiving unit that receives the process request; and a determining unit that determines whether to deny the process request based on the determination rule.

Abstract: A communication detection method in which, based on a sender and a destination of communication data recorded in a communication log that records information concerning communication data exchanged between devices linked to a network, the communication log is divided into parts corresponding to individual object devices. The communication logs divided corresponding to the individual devices are analyzed so that the communication data in which a connection request to each device has been issued is extracted, and then a response success/failure table is generated based on whether a response from the device to the connection request has been detected; and based on the response success/failure table, when a time period that no response is obtained from the device satisfies a criterion condition determined in advance, it is determined that peer-to-peer communication has been performed.

Abstract: An electronic mail management system for managing electronic mail includes an obtaining unit, an assigning unit and a memory. The obtaining unit obtains electronic mail whenever the electronic mail is sent or received. The assigning unit assigns at least one serial number to the electronic mail obtained by the obtaining unit. Each assigned serial number is a number from a sequence of numbers associated with at least one mail address included in the obtained electronic mail. The memory stores the obtained electronic mail in connection with the at least one assigned serial number.

Abstract: A malicious access-detecting apparatus which is cable of grasping the whole aspect of an attack which can occur, before it actually occurs. A monitoring information-collecting section collects monitoring information including the network events detected by the monitoring devices on networks. A malicious apparatus group-deriving section retrieves a corresponding piece of the event information from an event information storage device, and derives, based on the retrieved piece of the event information, apparatuses that are involved in relevant detected network events which belong to the predetermined type of network events and of which addresses of senders or recipients are same, as a malicious apparatus group involved in the predetermined type of malicious access. A storage section stores information on each derived malicious apparatus group. An output section outputs a list of the each derived malicious apparatus group.

Abstract: A recording medium recording a network shutdown control program permitting suitable preventive measures to be taken. A detector monitors each network segment to be managed, and on detecting a communication fulfilling a predetermined condition, the detector generates a detection notification and sends the notification to a quarantine manager. On acquiring the detection notification generated by the detector of the local device or a detection notification generated by a remote network shutdown device, the quarantine manager generates a shutdown operation request in accordance with quarantine policy stored in a quarantine policy storage, and sends the request to a communication shutdown unit. In accordance with the shutdown operation request, the communication shutdown unit sets shutdown data identifying a target of shutdown and controls packets to be input to and output from the network segment so that the packets may be shut off or passed.

Abstract: According to an aspect of an embodiment, a method for controlling an apparatus for transferring data from a plurality of first devices to a second device via a network, the data being transferred by using a packet, comprises the steps of: extracting type information identifying type of software conveyed by a packet and destination information identifying destination of the packet transmitted from one of the first devices; counting the number of kinds of the type information extracted from packets associated with the same destination information, respectively; and determining an unauthorized communication when the number of kinds of the type information is less than a predetermined value.

Abstract: According to an aspect of an embodiment, a method for controlling an apparatus for transferring data from a plurality of first devices to a second device via a network, the data being transferred by using a packet, the method comprises the steps of: extracting encryption information identifying method of encryption conveyed by a packet and destination information identifying destination of the packet transmitted from one of the first devices; counting the number of kinds of the destination information extracted from packets associated with the same encryption information, respectively; and determining an unauthorized communication when the number of kinds of the encryption information is less than a predetermined value.

Abstract: An anti-worm program allows a computer to execute control of communication suspected as worm communication, the program allowing the computer to execute: a communication information acquisition step that acquires communication information which is information concerning communication from a target source; and a communication control step that has a control amount calculation formula for calculating the control amount of the communication from the target source using the communication information and performs control of the communication from the target source based on the communication control amount obtained using the control amount calculation formula.

Abstract: The system includes the monitor agent that analyzes log of an entity. When an abnormality is detected, the monitor agent notifies about the abnormality to the control manager. The control manager decides a countermeasure and a countermeasure request party from the database and informs them to the action agent which the countermeasure request party. The action agent implements the countermeasure.

Abstract: An unauthorized access detection device capable of detecting unauthorized accesses which are made through preparation, in real time. When a packet travels on a network, a key data extractor obtains the packet and obtains key data. Next an ongoing scenario detector searches an ongoing scenario storage unit for an ongoing scenario with the key data as search keys. A check unit determines whether the execution of the process indicated by the packet after the ongoing scenario detected by the ongoing scenario detector follows an unauthorized access scenario being stored in an unauthorized access scenario storage unit. Then a report output unit outputs an unauthorized access report depending on the check result of the check unit.

Abstract: Disclosed is a vulnerability check program allowing a computer to execute a vulnerability check method for detecting vulnerability of a program to be checked. The program allows the computer to execute: a determination rule management step that manages a determination rule concerning vulnerability; a program input step that reads in the program to be checked; a processing flow trace step that traces the processing flow of the program to be checked with respect to a variable whose value is externally input to acquire information concerning the variable; a variable management step that manages the information concerning the variable; a vulnerability determination step that uses the determination rule and information concerning the variable to make determination of vulnerability; and an alert output step that outputs an alert message concerning the vulnerability detected by the vulnerability determination step.

Abstract: In a network relay device, unauthorized access from an internal computer to an external network is detected, an unauthorized destination service port used for the unauthorized access is specified, and a substitute port is allocated. A service relay unit and the internal computer are instructed to use the substitute port instead of the unauthorized destination service port, and an unauthorized access notification is sent. Mutual conversion of the unauthorized destination service port and a substitute service port is carried out, to relay a packet between an internal network and the external network.

Abstract: A computer-readable recording medium recording a worm detection parameter setting program for setting an appropriate worm detection parameter for target environments. When a log reader loads a communication log created within a prescribed time period, a log classifier classifies the entries of the communication log into categories based on communication contents. A frequency distribution creator analyzes the entries of a category, counts the number of appearance of each worm detection parameter value for each object of a preset network unit, and creates frequency distribution information. A threshold derivation unit analyzes the frequency distribution information and derives a threshold value that is used for determining whether a worm is propagating. An output unit outputs to an output device the threshold value for the worm detection parameter for the category, together with the frequency distribution information created by the frequency distribution creator, thereby providing a user with the information.

Abstract: A recording medium recording a network shutdown control program permitting suitable preventive measures to be taken. A detector monitors each network segment to be managed, and on detecting a communication fulfilling a predetermined condition, the detector generates a detection notification and sends the notification to a quarantine manager. On acquiring the detection notification generated by the detector of the local device or a detection notification generated by a remote network shutdown device, the quarantine manager generates a shutdown operation request in accordance with quarantine policy stored in a quarantine policy storage, and sends the request to a communication shutdown unit. In accordance with the shutdown operation request, the communication shutdown unit sets shutdown data identifying a target of shutdown and controls packets to be input to and output from the network segment so that the packets may be shut off or passed.

Abstract: A computer-readable recording medium having recorded a worm determination program capable of reliably determining a worm-infected communication. A worm determination apparatus for executing the program includes a plurality of physical ports functioning as network connection ports, a communication-information-acquisition unit, and a worm determination unit. The communication-information-acquisition unit acquires information about a packet type, classified according to a transmission-source address. The worm determination unit determines whether a communication is performed by a worm, based on the information about the packet type, classified according to the transmission-source address, acquired by the communication-information-acquisition unit and a determination criterion used for determining whether a communication is performed by a worm.

Abstract: A computer-readable recording medium recording a worm detection program which is preferably usable for a large-scale network and is capable of detecting worm communication with little information. A worm detection device which runs this program has a switching hub function, and comprises five physical ports that are network interfaces, a communication acquisition section, and a worm detector, for example. The communication acquisition section acquires ICMP type3 (destination unreachable message) packets going out of the physical ports. The worm detector determines whether the packet communication is worm communication, based on information on the ICMP type3 packets obtained for each source MAC address by the communication acquisition section and worm criteria set for determining whether communication is worm communication.