Abstract: A sensor apparatus includes a sensor unit, a calculation unit, a switch circuit unit, and a control unit. The sensor unit has a plurality of detection electrodes each having a capacitance changed by proximity of a detection target object. The calculation unit calculates a first distance, which is a distance between the detection target object and the sensor unit. The switch circuit unit is capable of switching the detection electrodes between a first state in which a signal voltage for detecting the capacitance is supplied and a second state which is an electrically floating state, and selects at least two detection electrodes one by one switched from the second state to the first state. The control unit controls the switch circuit unit to cause a second distance, which is a distance between the detection electrodes switched from the second state to the first state, to correspond to the first distance.

Abstract: An authentication function authenticates a PDA. The content database holds the usage conditions of a content and the information about the content. The communication function controls the reception of the usage conditions and the content information, both transmitted from the PDA. The content management function updates the usage conditions and the content information received, on the basis of the usage conditions and the content information held. The desired content is thereby retrieved quickly.

Abstract: Service data or usage right information, used as purchased content or license information, is set so as to be re-acquired on condition that an acquirer is an authorized content-purchasing client. A leaf ID as a client identifier in an enabling-key-block distribution tree, and a restoring-processing requesting file including verification data for the leaf ID are used as client identifying data, whereby it is ensured that an authorized content-purchasing client is verified.

Abstract: A network adapter includes: a network connection unit which is connected to a network, transmitting and receiving packet data; a bus connection unit which is connected to a bus, transmitting and receiving data and control information to a host device; an encryption/decryption processing unit executing an encryption/decryption application which encrypts contents or decrypts the encrypted contents; and a control unit executing software including respective hierarchies of a socket interface, a protocol stack and a device driver, and wherein the encryption/decryption application performs communication with the network connection unit or the bus connection unit through the socket interface, and wherein the control unit controls transmission and reception of data and control information of the bus connection unit by using a network device driver as the device driver.

Abstract: A communication system for guaranteeing only one each of two processing operations, correlated with each other and executed on different devices. A server has a unit which, on receipt of a first processing request, with identification information, executes this processing only once for one item of the identification, and a unit for transmitting a first processing completion notice to the transmission source of the processing request on completion of the first processing or on re-receipt of the processing request for the first processing with the same identification of the completed first processing. The client has a server, a unit for transmitting the processing request for first processing with identification information, a unit for executing a second processing, previously correlated with the first processing, on receipt of the completion notice, and a unit for re-transmitting a processing request on detection of an error before receipt of a transmitted completion notice.

Abstract: A communication system for guaranteeing only one each of two processing operations, correlated with each other and executed on different devices. A server has a unit which, on receipt of a first processing request, with identification information, executes this processing only once for one item of the identification, and a unit for transmitting a first processing completion notice to the transmission source of the processing request on completion of the first processing or on re-receipt of the processing request for the first processing with the same identification of the completed first processing. The client has a server, a unit for transmitting the processing request for first processing with identification information, a unit for executing a second processing, previously correlated with the first processing, on receipt of the completion notice, and a unit for re-transmitting a processing request on detection of an error before receipt of a transmitted completion notice.

Abstract: A communication system for guaranteeing only one each of two processing operations, correlated with each other and executed on different devices. A server has a unit which, on receipt of a first processing request, with identification information, executes this processing only once for one item of the identification, and a unit for transmitting a first processing completion notice to the transmission source of the processing request on completion of the first processing or on re-receipt of the processing request for the first processing with the same identification of the completed first processing. The client has a server, a unit for transmitting the processing request for first processing with identification information, a unit for executing a second processing, previously correlated with the first processing, on receipt of the completion notice, and a unit for re-transmitting a processing request on detection of an error before receipt of a transmitted completion notice.

Abstract: A communication system for guaranteeing only one each of two processing operations, correlated with each other and executed on different devices. A server has a unit which, on receipt of a first processing request, with identification information, executes this processing only once for one item of the identification, and a unit for transmitting a first processing completion notice to the transmission source of the processing request on completion of the first processing or on re-receipt of the processing request for the first processing with the same identification of the completed first processing. The client has a server, a unit for transmitting the processing request for first processing with identification information, a unit for executing a second processing, previously correlated with the first processing, on receipt of the completion notice, and a unit for re-transmitting a processing request on detection of an error before receipt of a transmitted completion notice.

Abstract: A content transmission server which records encrypted streaming data of a predetermined unit to which time information is added and transmits the encoded streaming data to a client, includes: a decryption section; a local encryption section; a storage section; and a transmission section. The decryption section is configured to decrypt the encrypted streaming data of the predetermined unit to which the time information is added. The local encryption section is configured to locally encrypt the streaming data decrypted by the decryption section. The storage section is configured to store the streaming data locally encrypted by the local encryption section. The transmission section is configured to transmit the encrypted streaming data to the client.

Abstract: An authentication function authenticates a PDA. The content database holds the usage conditions of a content and the information about the content. The communication function controls the reception of the usage conditions and the content information, both transmitted from the PDA. The content management function updates the usage conditions and the content information received, on the basis of the usage conditions and the content information held. The desired content is thereby retrieved quickly.

Abstract: An authentication function authenticates a PDA. The content database holds the usage conditions of a content and the information about the content. The communication function controls the reception of the usage conditions and the content information, both transmitted from the PDA. The content management function updates the usage conditions and the content information received, on the basis of the usage conditions and the content information held. The desired content is thereby retrieved quickly.

Abstract: Disclosed is an information providing apparatus comprising first reception control means for controlling the reception, from a first information processing apparatus, of user identification data for identifying a user of the first information processing apparatus and a request for purchasing a content, first transmission control means for controlling in response to the request for purchasing the content the transmission of the request for purchasing the content to a second information processing apparatus, second reception control means for controlling the reception of the content and usage conditions thereof supplied from the second information processing apparatus, storage control means for controlling the storing of the content and usage conditions thereof in correlation with the user identification data, third reception control means for controlling the reception of the user identification data and a request for sending the content supplied from the first information processing apparatus, and second trans

Abstract: Disclosed is an information providing apparatus comprising first reception control means for controlling the reception, from a first information processing apparatus, of user identification data for identifying a user of the first information processing apparatus and a request for purchasing a content, first transmission control means for controlling in response to the request for purchasing the content the transmission of the request for purchasing the content to a second information processing apparatus, second reception control means for controlling the reception of the content and usage conditions thereof supplied from the second information processing apparatus, storage control means for controlling the storing of the content and usage conditions thereof in correlation with the user identification data, third reception control means for controlling the reception of the user identification data and a request for sending the content supplied from the first information processing apparatus, and second trans

Abstract: Disclosed is an information providing apparatus comprising first reception control means for controlling the reception, from a first information processing apparatus, of user identification data for identifying a user of the first information processing apparatus and a request for purchasing a content, first transmission control means for controlling in response to the request for purchasing the content the transmission of the request for purchasing the content to a second information processing apparatus, second reception control means for controlling the reception of the content and usage conditions thereof supplied from the second information processing apparatus, storage control means for controlling the storing of the content and usage conditions thereof in correlation with the user identification data, third reception control means for controlling the reception of the user identification data and a request for sending the content supplied from the first information processing apparatus, and second trans

Abstract: A data communication system including a transmitting apparatus, a plurality of receiving apparatuses, a data transmitting apparatus, a data selecting and receiving means, a profile ID linking means, and a received data processing means. The transmitting apparatus incorporates a contents data generating means for generating a contents data. The data transmitting apparatus transmits data between the transmitting apparatus and the receiving apparatuses. The received data processing means processes data received by the data selecting and receiving means. The profile ID linking means initially generates a profile ID corresponding to a profile related to the contents data and/or transmission and reception of the contents data and then causes the profile ID to be linked with the contents data.

Abstract: A communication system is disclosed which permits data communication between a server apparatus and a client apparatus over a network. The server apparatus includes a time information managing means which manages time information and which transmits the time information to the client apparatus. The client apparatus includes a time storing means which receives the time information from the server apparatus, which stores the received time information, and which is tamper-proof.

Abstract: To provide an apparatus and method for realizing an improved content preview process in a content using mechanism based on content usage-right information. A client obtains default usage-right information (Default Usage Right) when it is registered to a license server, and determines, based on the default usage-right information, whether or not the content can be played back in a content preview process without purchasing the content. The client which is permitted to preview the content is limited to a client which has been registered to the license server to obtain the default usage-right information. This prevents preview-data from being randomly distributed.

Abstract: Service data or usage right information, used as purchased content or license information, is set so as to be re-acquired on condition that an acquirer is an authorized content-purchasing client . A leaf ID as a client identifier in an enabling-key-block distribution tree, and a restoring-processing requesting file including verification data for the leaf ID are used as client identifying data, whereby it is ensured that an authorized content-purchasing client is verified.

Abstract: A communication system for guaranteeing only one each of two processing operations, which are correlated with each other and which are executed on different devices. The system includes a server device and a client device. The server device is made up of a first processing executing unit which, on receipt of a processing request for a first processing, afforded with the identification information, executes this processing only once for one item of the identification information, and a completion notice transmitting unit for transmitting a completion notice of the first processing to the source of transmission of the processing request on completion of the first processing or on re-receipt of the processing request for the first processing afforded with the same identification information as that of the completed first processing.

Abstract: The authentication function (221) authenticates a PDA. The content database (224) holds the usage conditions of a content and the information about the content. The communication function (225) controls the reception of the usage conditions and the content information, both transmitted from the PDA. The content management function (222) updates the usage conditions and the content information received, on the basis of the usage conditions and the content information held. The desired content is thereby retrieved quickly.