Abstract: An apparatus for creating network configuration information from data including packet transmission time between one or more relay devices and a terminal, the relay devices relaying a signal which runs through a network and is measured by the terminal connected to the network, to another network, information about the relay devices and information about the terminal. The apparatus includes systems for: receiving the data from the terminal; arranging the relay devices in the network configuration information based on information about the relay devices; arranging the terminal in the network configuration information based on information about the terminal; arranging packet transmission time between the terminal and the relay devices in the network configuration information; and identifying a subnetwork from the data.

Abstract: A method and system are provided to replay an HTTP transaction that is comprised of multiple events. Each event is identified and organized based upon transaction of events over the course of time. The events of the transaction are replayed and organized into an order dependent relationship. The number of computations increases linearly with the number of events in the transaction.

Abstract: A method of limiting I/O access of a client to prevent data in a client connected to the system from being leaked and stolen, the method further canceling the limitation under a predetermined condition even if the client can not communicate with a server is provided. The method comprising the steps of locking I/O access of the client, determining whether the client is connectable to the server via a network, unlocking I/O access of the client in response to a determination of the client being connectable, by authenticating the client by the server, and unlocking I/O access of the client in response to the client not being connectable, by connecting a portable authentication device to the client to authenticate the client by the portable authentication device.

Abstract: An apparatus for creating network configuration information from data including packet transmission time between one or more relay devices and a terminal, the relay devices relaying a signal which runs through a network and is measured by the terminal connected to the network, to another network, information about the relay devices and information about the terminal. The apparatus includes systems for: receiving the data from the terminal; arranging the relay devices in the network configuration information based on information about the relay devices; arranging the terminal in the network configuration information based on information about the terminal; arranging packet transmission time between the terminal and the relay devices in the network configuration information; and identifying a subnetwork from the data.