Abstract: According to one embodiment, an electronic device includes a content transmitter. The content transmitter is configured to output a content item including first data and second data to one transmission path, by applying a first copyright protection system to copyright protection of the first data and applying a second copyright protection system to copyright protection of the second data. The first copyright protection system involves encryption of data to be copyright-protected. The second copyright protection system involves no encryption of data to be copyright-protected.

Abstract: According to one embodiment, an electronic device includes a content transmitter. The content transmitter is configured to output a content item including first data and second data to one transmission path, by applying a first copyright protection system to copyright protection of the first data and applying a second copyright protection system to copyright protection of the second data. The first copyright protection system involves encryption of data to be copyright-protected. The second copyright protection system involves no encryption of data to be copyright-protected.

Abstract: According to one embodiment, an electronic device includes a content transmitter. The content transmitter is configured to output a content item including first data and second data to one transmission path, by applying a first copyright protection system to copyright protection of the first data and applying a second copyright protection system to copyright protection of the second data. The first copyright protection system involves encryption of data to be copyright-protected. The second copyright protection system involves no encryption of data to be copyright-protected.

Abstract: According to one embodiment, an electronic device includes a content transmitter. The content transmitter is configured to output a content item including first data and second data to one transmission path, by applying a first copyright protection system to copyright protection of the first data and applying a second copyright protection system to copyright protection of the second data. The first copyright protection system involves encryption of data to be copyright-protected. The second copyright protection system involves no encryption of data to be copyright-protected.

Abstract: According to one embodiment, an electronic device includes a content transmitter. The content transmitter is configured to output a content item including first data and second data to one transmission path, by applying a first copyright protection system to copyright protection of the first data and applying a second copyright protection system to copyright protection of the second data. The first copyright protection system involves encryption of data to be copyright-protected. The second copyright protection system involves no encryption of data to be copyright-protected.

Abstract: According to one embodiment, an electronic device includes a content transmitter. The content transmitter is configured to output a content item including first data and second data to one transmission path, by applying a first copyright protection system to copyright protection of the first data and applying a second copyright protection system to copyright protection of the second data. The first copyright protection system involves encryption of data to be copyright-protected. The second copyright protection system involves no encryption of data to be copyright-protected.

Abstract: According to one embodiment, an electronic device includes a content transmitter. The content transmitter is configured to output a content item including first data and second data to one transmission path, by applying a first copyright protection system to copyright protection of the first data and applying a second copyright protection system to copyright protection of the second data. The first copyright protection system involves encryption of data to be copyright-protected. The second copyright protection system involves no encryption of data to be copyright-protected.

Abstract: According to one embodiment, a transmitting method transmits a start request for an authentication and key exchange from at least one of receivers to the transmitter, performs an authentication and key exchange for at least one of a first key common to the receivers and a second key peculiar to the at least one of the receivers, and encrypts the content by using a key shared by the transmitter and the at least one of the receivers to transmit the encrypted content to the at least one of the receivers.

Abstract: According to one embodiment, a transmitting method transmits a start request for an authentication and key exchange from at least one of receivers to the transmitter, performs an authentication and key exchange for at least one of a first key common to the receivers and a second key peculiar to the at least one of the receivers, and encrypts the content by using a key shared by the transmitter and the at least one of the receivers to transmit the encrypted content to the at least one of the receivers.

Abstract: According to one embodiment, an electronic device includes a content transmitter. The content transmitter is configured to output a content item including first data and second data to one transmission path, by applying a first copyright protection system to copyright protection of the first data and applying a second copyright protection system to copyright protection of the second data. The first copyright protection system involves encryption of data to be copyright-protected. The second copyright protection system involves no encryption of data to be copyright-protected.

Abstract: A projection device comprises a light source, a color wheel which is inserted into an optical path of the light source and in which a plurality of color segments are formed along a peripheral direction of the color wheel. The color segments are configured to transmit a plurality of wavelength band components in the white light in a time division manner during a rotation of the color wheel. A light source driving unit alternating-current discharges the light source at a period shorter than a rotation period of the color wheel while reverses a polarity at a timing to switch the segment of the color wheel inserted into the optical path.

Abstract: A transmission server includes an emergency information generator configured to generate emergency information indicating at least occurrence of emergency, an incoming operation identifier generator configured to generate an incoming operation identifier indicating at least an incoming operation for the broadcast message, and a communication unit configured to transmit the broadcast message including the emergency information and the incoming operation identifier. A mobile terminal includes a communication unit configured to receive the broadcast message, and a notification unit configured to execute the incoming operation for the broadcast message in accordance with the incoming operation indicated by the incoming operation identifier generator. The broadcast message in the radio network includes at least a message field and a specific type field. The emergency information is included in the message field, and the incoming operation identifier is included in the specific type field.

Abstract: A power steering driving device 100 includes an input shaft 6 provided with a serration 8 and connected to an input mechanism 3 linked to a steering handle 2, an output shaft 7 provided with a serration 10 and connected to an output mechanism 5 linked to a vehicle wheel 4, and a torsion bar 15 that connects the input shaft 6 and the output shaft 7 coaxially. The serration 8 of the input shaft 6 and the serration 10 of the output shaft 7 are formed such that a ratio between the respective numbers of teeth thereof is a decimal, and to specify a relative rotation position of the input shaft 6 and the output shaft 7 relative to the input mechanism 3 and the output mechanism 5, a tooth on the serration 8 of the input shaft 6 and a tooth on the serration 10 of the output shaft 7 having a relative position deviation angle about an identical central axis which is equal to or smaller than an allowable value are selected as reference teeth.

Abstract: An information processing apparatus has an authentication & key exchange unit, a contents receiver, a contents decryption unit and a contents confirmation request unit. The authentication & key exchange unit performs authentication & key exchange processing by using a given protocol with the communication apparatus and generates a first key shared with the communication apparatus. The contents receiver receives encrypted contents obtained by encrypting the contents with a second key generated by using the first key and the key information, and the key information attached to the encrypted contents. The contents decryption unit decrypts the encrypted contents by using the first key and the key information. The contents confirmation request unit instructs the communication apparatus to transmit or confirm the key information held by the communication apparatus, when the contents decryption unit decrypts the contents based on the second key firstly generated by using the first key.

Abstract: An information processing apparatus has an authentication/key exchange unit, a round trip time measuring unit, a common key transmitter, a contents key transmitter and a contents transmitter. The round trip time measuring unit sends a round trip time measuring request generated to the communication apparatus through the first communication connection to measure the round trip time, and check whether the measured round trip time is within a predetermined time and whether a transmitting source of the round trip request response is the communication apparatus sharing the first key. The common key transmitter encrypts a second key used for contents transmission by using the first key and transmits the encrypted second key through the first communication connection when the round trip time measuring unit succeeds in the checking.

Abstract: A recording and reproducing apparatus includes a file recorder, an interface, and controller which, upon receipt of content file with copy control information, records the content file in the recorder by adding thereto identification information M requesting transfer upon confirmation that a round-trip response time to a destination is not longer than a predetermined time, so that upon receipt of an instruction for transfer of the content file to an external device on the network, the controller determines whether the external device has a function of measuring and determining the round-trip response time to the destination, and in the case where the external device has function of measuring and determining the round-trip response time to the destination, transfers the content file to storage area of the external device, after measuring the round-trip response time and confirming that the measurement is not longer than predetermined time.

Abstract: A power steering driving device 100 includes an input shaft 6 provided with a serration 8 and connected to an input mechanism 3 linked to a steering handle 2, an output shaft 7 provided with a serration 10 and connected to an output mechanism 5 linked to a vehicle wheel 4, and a torsion bar 15 that connects the input shaft 6 and the output shaft 7 coaxially. The serration 8 of the input shaft 6 and the serration 10 of the output shaft 7 are formed such that a ratio between the respective numbers of teeth thereof is a decimal, and to specify a relative rotation position of the input shaft 6 and the output shaft 7 relative to the input mechanism 3 and the output mechanism 5, a tooth on the serration 8 of the input shaft 6 and a tooth on the serration 10 of the output shaft 7 having a relative position deviation angle about an identical central axis which is equal to or smaller than an allowable value are selected as reference teeth.

Abstract: A content reproducing apparatus includes: a disc drive device that reproduces content recorded on a recording medium; a network controller that controls data transmission between an external server specified by the content reproduced by the disc drive device; a content protection encoder/decoder unit that: (1) encodes a request to be sent to the external server via a proxy server that decodes the request; and (2) decodes a response from the external server being transmitted in response to the request decoded by the proxy server, the response being encoded by the proxy server; and a controller that controls the network controller and the content protection decode/encoder unit.

Abstract: A relay apparatus according to an embodiment of this invention includes an ID acquisition unit configured to acquire the unique ID of a partner device connected to a predetermined network, and a control unit which controls various processes on the basis of the unique ID of the partner device, which is acquired by the ID acquisition unit.

Abstract: In accordance with the present invention, a network relay device includes a first interface which is connected to a first network and sends contents information encrypted by key information, a second interface which is connected to a second network and sends the contents information to a receiving a network relay device, and a notification section which detects that the key information is changed and notifies a key change notification signal to the receiving network relay device.