摘要:
A communication device includes a data storage unit, a decryption unit, an encryption unit, and a judgment unit. The data storage unit stores a piece of encrypted data or a piece of decrypted data. The decryption unit decrypts each provided piece of encrypted data. The encryption unit encrypts each provided piece of decrypted data. The judgment unit issues an instruction to the encryption unit to read from the data storage unit first decrypted data obtained by the decryption unit decrypting first encrypted data with a cryptographic key, and to write back to the data storage unit second encrypted data obtained by the encryption unit encrypting the first decrypted data with the cryptographic key.
摘要:
A communication apparatus includes an encryption key generation unit that generates encryption key information at constant encryption key generation intervals, a common key generation unit that generates common key information uniquely with respect to a generation time at common key generation intervals set longer than the encryption key generation intervals, a common key application unit that performs encryption or decryption of the encryption key information by using the common key information, and an encryption key distribution unit that makes a request to a data transmitting/receiving unit to distribute the encryption key information to a plurality of communication apparatuses to be communicated simultaneously at encryption key distribution intervals set shorter than the encryption key generation intervals to perform communication with higher security.
摘要:
A communication apparatus includes an encryption key generation unit that generates encryption key information at constant encryption key generation intervals, a common key generation unit that generates common key information uniquely with respect to a generation time at common key generation intervals set longer than the encryption key generation intervals, a common key application unit that performs encryption or decryption of the encryption key information by using the common key information, and an encryption key distribution unit that makes a request to a data transmitting/receiving unit to distribute the encryption key information to a plurality of communication apparatuses to be communicated simultaneously at encryption key distribution intervals set shorter than the encryption key generation intervals to perform communication with higher security.
摘要:
A communication apparatus includes a plurality of communication nodes that select one communication route from among a plurality of communication routes, and perform a unicast communication with a communication partner on the communication route selected; and a wire that is used as a medium for supplying power to each of the communication nodes and as a communication medium between communication nodes, and connects each of the communication nodes to form a network of the communication route.
摘要:
When data is to be transmitted from a transmission source to a transmission destination in a wireless or wired ad-hoc network constructed in an indoor environment such as a house or an office, the data is transmitted by using a path that is formed over a plurality of channels that the respective nodes have. Also, when data transmission with high reliability is to be performed, same data is sent to two or more paths, thereby even when the data on one path cannot be normally delivered due to noise, the data can be delivered to the transmission destination without being affected by the noise by using the data transmitted on another channel.
摘要:
A control device of the invention is applied for a hybrid vehicle comprising an internal combustion engine, a motor and a rotational position detector to detect a rotational position of a rotary shaft of the motor. The control device performs a procedure for obtaining an offset amount according to a request for obtaining the offset amount, which offset amount is a difference between a detected rotational position of the rotary shaft with the rotational position detector and an actual rotational position of the rotary shaft. The control device is configured to perform the procedure for obtaining the offset amount while the engine is running, when the vehicle stops and the control device determines that there is the request for obtaining the offset amount.
摘要:
An information apparatus includes an apparatus information obtaining unit that obtains apparatus information from a plurality of apparatuses connected via a network to the information apparatus, an apparatus selection unit that selects a target apparatus from the plurality of apparatuses based on the obtained apparatus information, and a process result obtaining unit that sends a request to the target apparatus to request the target apparatus to perform a process corresponding to the request, and obtains a result of the performed process from the target apparatus.
摘要:
A control device is applied to a vehicle having a motor with a rotary shaft connected to a drive shaft of the vehicle, a rotational position detector to detect a rotational position of the rotary shaft of the motor, and a battery. The control device performs a procedure for obtaining an offset amount in response to a request for obtaining the offset amount, store the obtained offset amount, and keep the stored offset amount without relying on electric power supplied from the battery, which offset amount is a difference between a detected rotational position of the rotary shaft with the rotational position detector and an actual rotational position of the rotary shaft. The control device is configured to find an occurrence of the request for obtaining the offset amount when battery is dismounted from the vehicle.
摘要:
According to the present invention, there is provided a process for producing a transistor having a high precision and a high quality with a high yield by selectively etching a natural silicon oxide film, and further by selectively etching a dummy gate made of silicon. The present invention relates to a process for producing a transistor using a structural body which includes a substrate, and a dummy gate laminate formed by laminating at least a high dielectric material film and a dummy gate made of silicon having a natural silicon oxide film on a surface thereof, a side wall disposed to cover a side surface of the laminate and an interlayer insulating film disposed to cover the side wall which are provided on the substrate, said process including an etching step using a specific etching solution and thereby replacing the dummy gate with an aluminum metal gate.
摘要:
A wireless transmission path monitoring unit of a wireless device monitors the state of a wireless transmission path, transmits a PAUSE command stipulated in a MAC control protocol to a router, and performs a band limitation for the router regardless of a margin of a buffer when the state of the wireless transmission path has changed. In this way, it is possible to shorten the processing time until the band limitation is applied to the router after the state of the wireless transmission path changes, and to suppress transmission delay due to retransmission of transmission data.