Abstract: An input device includes: an inputter including a plurality of keys; a sensitivity controller that determines a sensitivity of input operation to the keys; an input detector that detects the presence or absence of input to the keys based on the input operation and the sensitivity; and an area controller that sets one or more input areas including at least one key to the inputter; wherein the sensitivity controller sets the sensitivity for each input area.

Abstract: A KVM (K: keyboard, V: Video, M: Mouse) switch connectable between a plurality of computers and a display, including: a plurality of input terminals that input analog image signals from the computers, respectively; a storage that stores an adjustment value that adjusts an image quality of each of the analog image signals for each input terminal; a processor that selects any one of the plurality of input terminals in accordance with an operation of an keyboard; and an adjustment circuit that adjusts the image quality of an analog image signal input to the selected input terminal based on the adjustment value corresponding to the selected input terminal.

Abstract: A communication apparatus includes a decipher deciphering received ciphered data, a first processor configured to generate, when receiving deciphered data for which the ciphered data is deciphered, a header of a first protocol including the deciphered data in a payload and an addition value for which the deciphered data is added in a predetermined size unit, a packet including the deciphered data, the header of the first protocol, and a header of a second protocol and a header of a third protocol, a second processor configured to calculate a checksum value set to the header of the second protocol using the addition value and a transmitter configured to transmit the packet to which the checksum value is set.

Abstract: A communication device includes, a plurality of authentication generation processing units, which are respectively associated with different sequence number groups each including successive sequence numbers and which execute, in parallel, authentication generation processes for generating authentication information included in the packets based on sequence numbers allocated to the packets, a transmitting unit which transmits packets including the allocated sequence numbers to another communication device in an order in which authentication generation processes by the plurality of authentication generation processing units are completed, a receiving unit which receives a packet from the other communication device, and an authentication processing unit which executes a first authentication process in which the reception packet is authenticated based on a relationship between a sequence number of the reception packet and a sequence number of a preceding reception packet.

Abstract: A KVM (K: keyboard, V: Video, M: Mouse) switch connectable between a plurality of computers and a display, including: a plurality of input terminals that input analog image signals from the computers, respectively; a storage that stores an adjustment value that adjusts an image quality of each of the analog image signals for each input terminal; a processor that selects any one of the plurality of input terminals in accordance with an operation of an keyboard; and an adjustment circuit that adjusts the image quality of an analog image signal input to the selected input terminal based on the adjustment value corresponding to the selected input terminal.

Abstract: In a first transmission apparatus, a first head encryption unit encrypts a head block of first plain text using ID. A non-head encryption unit encrypts a block using the preceding encrypted block. A first transmitter transmits first encrypted data and the ID to a second transmission apparatus. A first holding unit holds end encrypted data. A second head encryption unit encrypts a head block of second plain text using the end encrypted data. A second transmitter transmits second encrypted data generated by the second head encryption unit to the second transmission apparatus. In the second transmission apparatus, a first decryption unit performs decryption on the first encrypted data using the ID. A second holding unit holds the end encrypted data included in the first encrypted data. A second decryption unit decrypts the second encrypted data using the end encrypted data.

Abstract: A KVM (K: keyboard, V: video, M: mouse) switch to be connected between a computer, and a keyboard and a mouse, the KVM switch includes: a connector that is cascade-connected to another KVM switch; an inputter that inputs a creation instruction of control data including control information which controls the operation of the another KVM switch; a creator that creates the control data having a data format that is the same as a data format of key code data inputted from the key board or the mouse when a creation instruction of the control data is inputted, the control data including the control information and a first identifier indicative of the control data; and an outputter that outputs the created control data to the another KVM switch.

Abstract: A KVM (K: Keyboard, V: Video, M: Mouse) switch includes: a plurality of first ports each of which is connected to at least one of a computer and another KVM switch, the another KVM switch having a plurality of third ports connectable to a computer; a second port; a connection unit that selects a first port from the plurality of first ports, and connects the selected first port to the second port; and a control unit that transmits a control signal to the another KVM switch via the selected first port when the first port connected to the computer is connected to the second port, the control signal being a signal for selecting a third port to be connected to the second port from the third ports.

Abstract: An encrypted communication device includes: a pattern generation unit configured to judge whether or not a security association including as matching data a data portion whose data pattern matches between data in a packet targeted for processing and data in a sample packet is to be generated; a key information exchange unit configured to transmit to an opposite device a key information exchange packet including the matching data and key data when the pattern generation unit judges that the security association is to be generated, and receives from the opposite device a key information exchange packet including a security association identifier of the security association, thereby establishing the security association with the opposite device; and a key information unit configured to store the matching data, the key data, and the security association identifier of the security association established by the key information exchange unit.

Abstract: A video signal adjustment system that is capable of being connected between a server and a console includes: a server unit that is connected to the server; a main unit that is connected to the server unit, and includes a first adjustment portion that adjusts gain and frequency characteristic of a video signal output from the server; and a console unit that is connected between the main unit and the console, and includes a second adjustment portion that adjusts gain, frequency characteristic, and delay of the video signal output from the main unit.

Abstract: A KVM (K: keyboard, V: video, M: mouse) switch to be connected between a computer, and a keyboard and a mouse, the KVM switch includes: a connector that is cascade-connected to another KVM switch; an inputter that inputs a creation instruction of control data including control information which controls the operation of the another KVM switch; a creator that creates the control data having a data format that is the same as a data format of key code data inputted from the key board or the mouse when a creation instruction of the control data is inputted, the control data including the control information and a first identifier indicative of the control data; and an outputter that outputs the created control data to the another KVM switch.

Abstract: In a first transmission apparatus, a first head encryption unit encrypts a head block of first plain text using ID. A non-head encryption unit encrypts a block using the preceding encrypted block. A first transmitter transmits first encrypted data and the ID to a second transmission apparatus. A first holding unit holds end encrypted data. A second head encryption unit encrypts a head block of second plain text using the end encrypted data. A second transmitter transmits second encrypted data generated by the second head encryption unit to the second transmission apparatus. In the second transmission apparatus, a first decryption unit performs decryption on the first encrypted data using the ID. A second holding unit holds the end encrypted data included in the first encrypted data. A second decryption unit decrypts the second encrypted data using the end encrypted data.

Abstract: An encrypted communication device includes: a pattern generation unit configured to judge whether or not a security association including as matching data a data portion whose data pattern matches between data in a packet targeted for processing and data in a sample packet is to be generated; a key information exchange unit configured to transmit to an opposite device a key information exchange packet including the matching data and key data when the pattern generation unit judges that the security association is to be generated, and receives from the opposite device a key information exchange packet including a security association identifier of the security association, thereby establishing the security association with the opposite device; and a key information unit configured to store the matching data, the key data, and the security association identifier of the security association established by the key information exchange unit.

Abstract: A communication device includes: a first and a second connectors that are connectable to an external device via a first and a second cables, respectively; a detector that detects attachment and detachment of the second cable to the second connector; and a controller that communicates information on attachment and detachment of the second cable to the external device via the first cable, changes a communication mode from a first mode to a second mode when the second cable is attached to the second connector, and changes the communication mode from the second mode to the first mode when the second cable is detached from the second connector, the first mode being a mode in which the controller communicates with the external device via the first cable, and the second mode being a mode in which the controller communicates with the external device via the first and the second cables.

Abstract: A packet is transmitted from a transmitting device to an active communication device which transmits a reception history identifying the received packets to the transmitting device. The transmitting device transmits an active-mode request message to a standby communication device when having failed to receive the reception history from the active communication device within a predetermined time period. Then, the standby communication device becomes a new active communication device, and the active communication device becomes an old active communication device. The new active communication device transmits to the transmitting device a switching request message for switching a destination of the packet from the old active communication device to the new active communication device.

Abstract: An electronic apparatus includes a display, a display controller that displays an image on the display in accordance with an image signal input from outside, a first power supply unit that coverts an alternating-current power into a first power having a first voltage, and supplies the first power to the display, a shutoff unit that shuts off the alternating-current power being supplied to the first power supply unit, based on the image signal, and a second power supply unit that converts the alternating-current power into a second power having a second voltage, and supplies the second power to the display controller and the shutoff unit.

Abstract: A KVM (K: Keyboard, V: Video, M: Mouse) switch includes: a plurality of first ports each of which is connected to at least one of a computer and another KVM switch, the another KVM switch having a plurality of third ports connectable to a computer; a second port; a connection unit that selects a first port from the plurality of first ports, and connects the selected first port to the second port; and a control unit that transmits a control signal to the another KVM switch via the selected first port when the first port connected to the computer is connected to the second port, the control signal being a signal for selecting a third port to be connected to the second port from the third ports.

Abstract: A signal transmission system includes a transmitting device and a receiving device. The transmitting device includes a superimposition portion that superimposes at least one synchronizing signal on at least one video signal among a plurality of video signals, and outputs the synchronizing signal and the video signal as a superimposition signal to a receiving device. The receiving device includes a separation portion that separates the superimposition signal into the synchronizing signal and the video signal, a first adjustment portion that adjusts an amount of delay of the separated video signal to another video signal, and a second adjustment portion that adjusts an amount of delay of the separated synchronizing signal.

Abstract: A KVM switch includes: server units respectively connected to computers; user units respectively connected to input/output devices for transmitting signals to the computers and receiving signals from the computers; and a main unit that connects the server units and the user units. Each of the server units, user units and main unit is a communication unit and includes: a first part communicating with another communication unit to inform the above another communication unit of unit type information about the communication unit and receive unit type information about the above another communication unit therefrom; and a second part controlling communications with the above another communication unit on the basis of the unit type information acquired from the above another communication unit.

Abstract: A device including: a receiving unit receiving a packet; a packet determining unit determining whether the received packet is a head fragment packet or an intermediate or last fragment packet; a search control unit using search data registered previously for searching for packet information and search data used for identifying the same fragment of the fragment packet on the same search address; and an assembly processing unit assembling the fragment packets, wherein the search control unit extracts a fragment identifier from the head fragment packet and registers the fragment identifier as the search data on the same search address as the search address of the search data registered previously for searching for the packet information and extracts the fragment identifier of the intermediate fragment packet or the last fragment packet, makes a search in a way that uses the fragment identifier as search target data, and assembles the fragment packets.