Fujitsu Corporation

Masahiro Komura

Satoru Torii

Masashi Mitomo

Yasutsugu Kuroda

Etsuo Ono

Bintatsu Noda

Yoshiki Higashikado

Kazumasa Omote

Hidenobu Ito

Seigo Kotani

Yuji Imai

Shoko Iwase

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.

Unauthorized communication detection method

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.

Anti-worm program, anti-worm apparatus, and anti-worm method

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.

Communication detection device, method, and program for peer-to-peer communication

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.

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.

Recording medium recording a network shutdown control program, and network shutdown device

The security information mediation apparatus comprises security information registering unit which registers security information supplied by a client of a user, a transfer unit which transfers the security information registered in the security information registering unit to a client of a program developer. This client judges the usefulness of the security information and outputs reply information when the  security information is useful. A reply information registering unit receives the reply information and payment information that indicates payment of the information presentation fee of the corresponding security information from the developer client. A transfer unit transfers the reply information and payment information to the client of the user.

Method and apparatus for mediation of security information, and a computer product

The digital signatures of users A and B are created for a transaction document which states the contents of a transaction between the users A and B, and they are sent to a transaction proof device of a notary public being a third party, together with the transaction document. Thus, the users A and B and the notary public share information, and the notary public can objectively prove the transactional contents, etc.

Apparatus and method for proving transaction between users in network environment

In an authentication system for companies, a server appends suitable verification data to an electronic document to be circulated through terminal units for persons in charge. Each terminal is allocated a unique function in advance and applies it to the verification data in turn when receiving the document. Upon receipt of the document that has been circulated through the persons in charge, the server examines the function-applied value appended to the document to determine whether the document has been circulated correctly through the persons in charge, or via the correct route.

System and method of authentication of digital information

When a client sends an RPC request that requests a server for a service, the client adds identification information to the RPC request. When an active server receives an RPC request, it stores the identification information thereof in a stable area that is not destroyed even if a defect takes place in the client or the server, and executes the requested service. When a defect takes place in the active server, the backup server takes over the process of the active server. A PALIB of the backup server compares the identification information of the RPC request re-sent from the client with the identification information in the stable area. When they match, the PALIB determines that the RPC request is redundant. The backup server performs a redundant process and sends back the correct result to the client.

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Kawasaki, Japan

Masahiro Komura