Fujitsu Corporation

Dai Suzuki

Satoshi Imai

Toshihiro Shimizu

Mitsuya Kawashita

Koki Inoue

A computer-readable recording medium storing a program to be executed by a first apparatus in a system of issuing attribute certificate information of each user, the program including instructions for causing a processor of the first apparatus to execute processing including: obtaining, from a second apparatus in the system, a value unique to an identifier that uniquely identifies a user, the second apparatus being a device capable of verifying authenticity of an electronic document to be signed; creating certificate information that includes attribute information identified from the attribute certificate information, certification information that certifies the attribute information, and the obtained value; generating an electronic signature for the electronic document and the certificate information using a private key that corresponds to the identifier; and outputting the electronic document and the certificate information to which the generated electronic signature is attached in association with the identifier.

Computer-readable recording medium storing information processing program, information processing apparatus, and system

A non-transitory computer-readable storage medium storing a transmission support program that causes at least one computer to execute a process, the process includes generating a management identifier of a message in response to reception of the message; returning the management identifier to a transmitter of the message; when receiving the management identifier and lists of personal identifiers of individuals who have attributes according to conditions regarding the attributes, from each of a plurality of companies that holds information on the attributes of the individuals, based on reception of the conditions and the management identifier from the transmitter, specifying the personal identifiers that are duplicate between the lists that have the management identifier that is common; and transmitting the specified personal identifiers and the received message.

Storage medium, transmission support device, and transmission support method

A relay device includes a communicator configured to transmit and receive a message to and from the communication device, and a processor configures to acquire a public key of a communication device that is a transmission source of the message from the node and authenticates a signature included in the message with the acquired public key, wherein the processor causes, when receiving a communication message including communication data to be transmitted to a second communication device by a first communication device, the processor to perform authentication on the communication message, and the communicator transmits the communication message to the second communication device when the authentication is successful.

Relay device, non-transitory computer-readable storage medium and communication system

A communication device includes circuitry configured to acquire a digital certificate including information associated with a first attribute from a first device coupled to any of a plurality of devices sharing a distributed ledger having recorded therein a correspondence between an attribute of user information included in the digital certificate and a definition of the attribute, receive a request for information associated with a second attribute from a second device coupled to any of the plurality of devices, acquire a first definition associated with the first attribute, and a second definition associated with the second attribute, from any of the plurality of devices, and transmit a digital certificate including information associated with the first attribute to the second device together with a message notifying that the first attribute and the second attribute have the same definition, when the first definition and the second definition match.

Storage medium, communication method, and communication device

A communication device provides data to a data acquiring node based on a consensus of a plurality of participating nodes. The communication device includes a processor. The processor divides the data into N data components. N is an integer equal to or larger than two. When the N data components are stored in different storage areas, the processor encrypts addresses of storage areas in which the data components are respectively stored with respective public keys of N participating nodes among the plurality of participating nodes. The processor transmits access right information that indicates the data acquiring node has a right to access the data and the encrypted N addresses to the plurality of participating nodes.

Communication device and communication method used in decentralized network

A communication apparatus configured to acquire information in a distributed ledger shared in a network, the communication apparatus includes a memory; and a processor coupled to the memory and configured to acquire one or more digital certificates used by a user of another apparatus to apply to the communication apparatus from the other apparatus, acquire type information that identifies a combination of the user and the type of information certified by the one or more digital certificates, by using the distributed ledger, acquire certificate issue history that is recorded in the distributed ledger in association with the type information, and determine whether the issue history contains information of another digital certificate that has not been acquired from the other apparatus.

Communication apparatus and communication method

A communication method is used in a communication system that includes a plurality of nodes. Two or more authentication nodes among the plurality of nodes respectively receive account information of a user and a public key of the user from the user. The two or more authentication nodes respectively transmit a massage that indicates the account information is correct and the public key of the user to the plurality of nodes when it is decided that the account information is correct. Each of the plurality of nodes registers the public key of the user in a public key list that stores public keys of users who have been allowed to participate in the communication system, when detecting according to messages received from other nodes that a specified number of authentication nodes or more have decided that the account information is correct.

Device and method for processing public key of user in communication system that includes a plurality of nodes

A control device that controls a transfer device, includes a memory and a processor coupled to the memory and configured to evaluate, for each of a plurality of processing rules to be used to process a packet in the transfer device, a processing load caused upon identification of a packet matching the processing rule, based on the type of an application requirement identifying the packet to which the processing rule is applied, generate, as a table to be used by the transfer device, a rule table storing the plurality of processing rules in order from the lowest processing load to the highest processing load, and transmit, to the transfer device, a control packet to request the transfer device to set the rule table.

Control device, transfer device, and control method

A firewall control device controls a plurality of firewall devices provided between a core network and a plurality of sub-networks respectively, the firewall control device is configured to receive, from the plurality of firewall devices, data amount information indicating an amount of the data discarded in the plurality of firewall devices respectively and node information indicating a transmission source node of the discarded data, identify, based on the data amount information and the node information, a data flow including the discarded data which is transmitted from an information processing device indicated by the node information and of which total amount of the discarded data exceeds a threshold value, and set, in a first firewall device which is included in the plurality of firewall devices and which is coupled to the information processing device, a first discarding flow entry defining discarding of data of the identified data flow.

Firewall control device, method and firewall device

A transmission apparatus includes a digital circuit that has an input circuit into which packets are input at indefinite intervals; a measuring circuit that measures an interval during which no packet is input into the input circuit; a determiner circuit that determines, based on the interval measured by the measuring circuit, whether to insert a given frame between packets input into the input circuit; and a transmitter that inserts, based on a result of determination by the determiner circuit, the given frame between the packets input into the input circuit and sequentially transmits the packets with the given frame therebetween.

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Kawasaki, Japan

Dai Suzuki