摘要:
Provided is a content distribution system and the like that enables division at an appropriate position when dividing a content to record the content on a recording medium. A content distribution system (100) includes: a content distribution apparatus (200) that distributes a content; and a terminal apparatus (300) that records the content. The content distribution apparatus (200) includes: a storage unit (201) that stores division information indicating a division position at which the content is divided; and a distribution unit (204) that reads the division information from the storage unit (201) and distributes the division information to the terminal apparatus (300). The terminal apparatus (300) includes: a receiving unit (302) that receives the division information from the content distribution apparatus (200); and a recording unit (304) that obtains the content divided at the division position indicated by the division information and records divisional contents on plural recording medium (304).
摘要:
To reduce a frequency of recording communication management information for communication disconnection countermeasure. A digital content distribution system includes a license server (101) that issues a license, and a user terminal (103) that controls use of content based on the issued license. The license server (101) judges, according to the license to be issued, whether or not the communication management information for the communication disconnection countermeasure needs to be recorded, and notifies the user terminal of a result of the judgment. This enables the user terminal (103) to reduce the frequency of recording the communication management information.
摘要:
The transmission format A license conversion unit (430) of the terminal device (120) converts the transmission format license (710), which is obtained from the license relay server (110), described in a transmission format into a processing format license (510) to be specified by the conversion format specification information (711) and detects modifications on the license whose format has already been converted by performing a signature verification on the after-conversion processing format license (510) using a processing format signature (712).
摘要:
To reduce a frequency of recording communication management information for communication disconnection countermeasure. A digital content distribution system includes a license server (101) that issues a license, and a user terminal (103) that controls use of content based on the issued license. The license server (101) judges, according to the license to be issued, whether or not the communication management information for the communication disconnection countermeasure needs to be recorded, and notifies the user terminal of a result of the judgment. This enables the user terminal (103) to reduce the frequency of recording the communication management information.
摘要:
A terminal apparatus is provided which guarantees operation of a use condition bytecode while securing a degree of freedom for a service provider generating the use condition bytecode. A terminal apparatus (300), in which a license (1200) includes a use condition determining logic code (1204) and a version number (1202), includes a license obtainment unit (304) obtaining the license (1200), a use condition verification unit (302) determining, based on the version number (1202), whether or not an operation of the use condition determining logic code (1204) has been confirmed, a use condition bytecode execution unit (303) executing the use condition determining logic code (1204) when the operation of the use condition determining logic code (1204) has been determined to have been confirmed, and a content playback unit (306) playing back content based on the use condition determining logic code (1204).
摘要:
A terminal apparatus is provided which can guarantee operation of a use condition bytecode while securing the degree of freedom for a service provider generating the use condition bytecode. A terminal apparatus (300), in which a license (1200) includes a use condition determining logic code (1204) and a version number (1202), includes a license obtainment unit (304) which obtains the license (1200), a use condition verification unit (302) which determines, based on the version number (1202), whether or not the operation of the use condition determining logic code (1204) has been confirmed, a use condition bytecode execution unit (303) which executes the use condition determining logic code (1204) when the operation of the use condition determining logic code (1204) has been determined to have been confirmed, and a content playback unit (306) which playbacks content based on the use condition determining logic code (1204).
摘要:
A network connecting device includes: a network device for connecting to the network; a profile generation determination section for determining whether or not to generate a profile including information necessary for forming a connection with the network; a profile generation section for generating the profile when the profile generation determination section determines to generate the profile; a profile management section for managing the profile generated by the profile generation section; and a network connection section for controlling the network device and connecting to the network, based on the profile managed by the profile management section.
摘要:
The present invention provides a rights management terminal that can securely send and receive usage information while preventing spoofing and protecting user's privacy. The rights management terminal manages a copyright of a content using a license that includes a usage rule of the content, and includes: a first public key certificate management unit which manages, as a set, a first public key certificate that includes identification information for uniquely identifying at least one of the rights management terminal and a user using the terminal, and a first private key paired with a first public key included in the first public key certificate; a second public key certificate management unit which manages, as a set, a second public key certificate that does not include the identification information, and a second private key paired with a second public key included in the second public key certificate; a selection processing unit that selects, as a set, one of the following: the first public key certificate and the first private key; and the second public key certificate and the second private key; and an authentication processing unit that executes authentication for communicating with a server apparatus, using the public key and the private key that are selected as a set by the selection processing unit.
摘要:
In a content reproduction apparatus according to the present invention, for example, a content usage time indicating a usage permitted time of content is set for the content, and a content reproduction management unit 811 manages a usage state and a rewind limit position of the content. Here, the rewind limit position is a position which indicates that the content cannot be reproduced till the end in the case where a user executes a rewind operation. For example, in the case where the user attempts to execute the rewind operation on the part that is in front of the rewind limit position, the content management unit 811 notifies the user of a warning message in advance.
摘要:
The subscriber circuit has a balanced amplifier and a built-in call-current polarity changing circuit. Moreover, the output stage circuits of the direct feed-back and offset cancel circuits of the subscriber circuit have the same configuration. By switching the input voltage supplied to the direct feed-back and offset cancel circuits by a switch, the signals fed back to the inputs of the balanced amplifier are switched. Thus, the polarity of the loop current can be inverted. Furthermore, it is possible to switch the loop current without adopting an extra circuit, and the part of the circuit in which the switches are not required to withstand pressure can be constructed with CMOS thereby allowing minimization of the circuit size.