摘要:
To provide a content distribution system which can prevent use of content which has been temporarily stored after the valid period.A content distribution system (1) including a license server (101) which issues a license, a content server (102) which transmits the content, a terminal device (103) which controls use of the content based on the issued license. The terminal device (103) does not allow the use of the received encrypted content when it is judged that the encrypted content received from the content server (102) is not the content received in real time.
摘要:
To provide a content distribution system which can prevent use of content which has been temporarily stored after the valid period.A content distribution system (1) including a license server (101) which issues a license, a content server (102) which transmits the content, a terminal device (103) which controls use of the content based on the issued license. The terminal device (103) does not allow the use of the received encrypted content when it is judged that the encrypted content received from the content server (102) is not the content received in real time.
摘要:
A broadcast station that is a transmission device assigns an ID and a license transformation period to a license to be generated, and transmits to a terminal apparatus 102, in order to provide a digital right management system which can provide a protection for the rights of a provider while preventing an unauthorized obtainment of a license to be transmitted through a digital broadcast. The terminal apparatus 102 records a license import log including the license ID and license transformation period assigned to the license. Further, the terminal apparatus 102 controls a license obtainment in the case where the same license has been obtained by the time of obtaining the license. Furthermore, the license received by the terminal apparatus 102 is kept at least until the license transformation period expires.
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:
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 content distribution management system includes a plurality of content distributing devices, which each include a content storage processing unit operable to store and distribute a content, a user interface unit operable to provide viewing and information of a content for a user, a content acquisition processing unit operable to acquire a content from a content providing device, etc. and to perform purchase processing of the content, and a sending/receiving unit operable to exchange data via a communication network. The content distribution management system also includes a content distribution management device, which includes a payment management processing unit operable to perform payment processing of a content, and a copyright management processing unit operable to manage and send copyright-related information (a usage rule, key information, etc.). The content distributing devices and the content distribution management system are configured via the communication network, etc.
摘要:
The present invention relates to an information distribution system including a distribution device (100) for broadcasting a content and a terminal device (200) for receiving the content broadcast from the distribution device (100). The distribution device (100) includes a PKI-related information acquisition instruction addition determination section (104) for determining whether or not PKI-related information stored therein has been updated, and a broadcast signal multiplex and transmission section (103) for, when the PKI-related information acquisition instruction addition determination section (104) determines that the PKI-related information has been updated, broadcasting a PKI-related information acquisition instruction for requesting the terminal device to acquire latest PKI-related information as being multiplexed to the content, together with information required for using the content. The terminal device (200) includes a PKI-related information acquisition determination request section (205) for, when receiving the PKI-related information acquisition instruction which is broadcast, requesting acquisition of the latest PKI-related information.
摘要:
IC card (300) supplies an encryption key which enables content use, to a terminal apparatus (200) belonging to a domain made up of terminal apparatuses (200) which share the IC card (300). The IC card (300) includes: an extra-domain usage rule holding unit (305) which stores a rule for use of the IC card (300) in a terminal apparatus (200) which is outside of the domain; and an extra-domain use permission judgment unit (309) which judges, according to the usage rule, whether or not use of the IC card (300) is permitted, when the IC card (300) is provided to the terminal apparatus (200). The IC card (300), in addition, supplies the encryption key to the terminal apparatus (200) which is outside of the domain, when the extra-domain use permission judgment unit (309) judges that use is permitted.
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:
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).