Hitachi, Ltd.

Akifumi Yato

Tadashi Kaji

Takahiro Fujishiro

Kazuyoshi Hoshino

Shinichi Irube

Hiroki Uchiyama

Naoki Hayashi

Osamu Takata

Yoko Hashimoto

Satoshi Ohkubo

Kohhei Yamaguchi

Dan Yamamoto

Proposed are a log analyzing system and a log analyzing method capable of more effectively defending a control system from unauthorized access. The log analyzing system which analyzes a communication log of a control device comprises a network device which receives a communication packet corresponding to the communication log from a network, and a monitoring device which monitors communication to the network device, wherein the monitoring device obtains a difference between a communication pattern of the communication packet and a stable pattern, which is a pattern of a communication in a state of no unauthorized access, restores the communication packet based on the difference, and notifies the restored communication packet.

Log analyzing system and method

An ID bridge service system manages a type and assurance of identity information required for provision of service by an application service system and a type and assurance of identity information managed by plural authentication service systems, and is provided with a selecting measure that selects an authentication service system that manages identity information corresponding to the identity information required for the provision of the service by the application service system out of the plural authentication service systems when a request for authentication is received from the application service system and a requesting measure that requests the selected authentication service system to authenticate.

ID bridge service system and method thereof

To minimize risk of printing-out to a printer located at an improper base, where a network is established between the bases, terminal devices, a server, printers, and a management device which manages printers are provided. The management device manages position information of the printers installed in bases. Every time printing is requested, the management device extracts printer candidates located close to a terminal device and asks a user of the terminal device to select one of the printer candidates. The user visually confirms the installation locations of the extracted printer candidates included in a list and selects an appropriate printer for each printing. Accordingly, risk of erroneously printing using a printer installed in an improper base can be reduced.

Device and system for assisting printer selection through a network

A method and a system for speeding up session establishment are provided, wherein the time required to establish a session is reduced, even in the case where a session management server requires a large amount of time to process respective functions required for establishing the session (such as making a decision regarding whether to permit or deny provision of a service, or generating a session key). The session management server is provided with means for conducting, in parallel, processing to issue processing requests for respective functions required for establishing a session (such as making a decision regarding whether to permit or deny provision of a service, or generating a session key) and processing to forward a communication message transmitted by a communications device or another session management server attempting to establish a session.

Data communication system enabling data communication between communication devices through a server

Each terminal registers the key generation information into each session management server, the information including a plurality of setting items necessary for determining set values to generated a key to be used by itself, and set value candidates which are stored in the setting items. When the encryption communications are established between the terminals, the individual session management servers and a key generation information management server are associated, so that the key generation information management server selects the algorithm suite based on the key generation information. The session management server generates the parameters based on the selected algorithm suite, acquires the information on the selected algorithm suite from the key generation information management server, generates the key for the encryption communications based on that information and distributes the key to the each terminal.

Growing community of inventors

Kawasaki, Japan

Akifumi Yato