Abstract: When a secure counter malfunction detection unit 212 deters a malfunction in a secure counter 211, a content playability judgment unit 206 performs a content playability judgment based on information managed by a malfunctioning-state playback processing management unit 214. The malfunctioning-state playback processing management unit 214 stores a malfunctioning-state playback condition composed of information such as a playback count and a playback time. The content playability judgment unit 206 judges that content is playable when the malfunctioning-state playback condition is met, and a content playback unit 210 splays the content.

Abstract: A user terminal (110) having a license purchase unit (603) obtaining a license (500) indicating a content usable time (502) of a content data (200) composed of a plurality of elements (203), each of which can be replayed individually. The user terminal (110) also having an availability judgment unit (604) judging whether or not encrypted elements (203) included in the content data (200) are available, based on the content usable time (502) indicated in the obtained license (500), and having a replay/display unit (607) replaying the encrypted elements judged as available. In addition, the user terminal (110) having a use status management unit (608) specifying license-consuming elements, each of which consumes an authorized amount of replay under right, out of the elements that are being replayed, and measuring a content used time (504) consumed by replaying the specified license-consuming elements.

Abstract: Providing a data structure appropriate for performing rights management for multimedia-type contents, and further providing a recording medium containing data with the data structure, and a reproduction device and a reproduction method for reproducing the data. The present invention is a computer-readable recording medium having recorded thereon license data for permitting a computer to use contents data comprising a plurality of resources, the license data including a resource-based use condition configuration structure, in which a use condition is set for the computer with respect to each of resources.

Abstract: When a secure counter malfunction detection unit 212 deters a malfunction in a secure counter 211, a content playability judgment unit 206 performs a content playability judgment based on information managed by a malfunctioning-state playback processing management unit 214. The malfunctioning-state playback processing management unit 214 stores a malfunctioning-state playback condition composed of information such as a playback count and a playback time. The content playability judgment unit 206 judges that content is playable when the malfunctioning-state playback condition is met, and a content playback unit 210 splays the content.

Abstract: When a secure counter malfunction detection unit 212 deters a malfunction in a secure counter 211, a content playability judgment unit 206 performs a content playability judgment based on information managed by a malfunctioning-state playback processing management unit 214. The malfunctioning-state playback processing management unit 214 stores a malfunctioning-state playback condition composed of information such as a playback count and a playback time. The content playability judgment unit 206 judges that content is playable when the malfunctioning-state playback condition is met, and a content playback unit 210 splays the content.

Abstract: A content distribution system distributes a content key and content use conditions for controlling a content use in a client apparatus to the client apparatus, via a communication channel, from either a multicast distribution server or a unicast distribution server. A content distribution management server determines by which distribution method to send the content key and content use conditions of each content according to an attribute of the content (a compression format, a compression ratio, a content holder, and the like). An encrypted content distribution server distributes only encrypted content whose content key and content use conditions are to be distributed by the unicast, and the multicast distribution server distributes encrypted content whose content key and content use conditions are superimposed by the multicast.

Abstract: A contents using device (or a terminal device) 300 is composed of: a license processing unit 305 which judges, on the basis of a usage rule of a license, whether or not the content is available; a content reproduction unit 304 which uses the content judged by the terminal device 300 to be available; a restriction unit (or a content reproduction unit 304) which restricts the license corresponding to the contents from being used by another source by reason that the license is currently in use, for a time period between a start and a normal end of the content usage by the content reproduction unit 304; an event detection unit 307 which detects a predetermined event that occurs between the start and the normal end of the content usage and that forcefully aborts the content usage; a restriction-relaxation necessity judgment unit (or a recovery/penalty judgment unit) 309 which judges whether or not the predetermined event is against an intention of a user; and a restriction relaxation unit (or a license recovery un

Abstract: A content playback apparatus reduces load concentration on a specific server apparatus that manages content keys of encrypted content, while protecting copyrights of the content. The content apparatus makes playback of content recorded in a recording medium sold possible after the specific server breaks down. A key acquisition control unit (204) reads a playback control information table (211) from a recording medium (102) via a reading unit (201). The key acquisition unit (204) acquires a rights key via a key acquisition intermediation unit (223) from an apparatus specified by an acquisition-destination type and a request-destination type that are stored in the playback control information table (211) and that corresponding to the content to be played. The key acquisition unit (204) generates a content key using the acquired rights key and, when required, a medium key recorded in a medium. A decryption unit (203) decrypts encrypted content using the content key.

Abstract: In a content delivery system including a server and content processing apparatus connected to each other across a network, a content delivered by the system is encrypted with a content key Kc, and supplied along with a sublicense encrypted with a work key Kw to a DTV. The sublicense includes a second use condition under which a content is used and a content key Kc for decrypting an encrypted content. The work key Kw for decrypting an encrypted content is included in a main license. The main license is supplied to the DTV separately from the content. The main license includes, in addition to the work key Kw, a first use condition under which a content under a subscription contract is used.

Abstract: 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.

Abstract: A method is provided for judging use permission of information on one or more terminal apparatuses which use content provided by a content provider and metadata provided by a metadata provider and supplementing the content, the method comprising: metadata use permission judgment judging use permission of the metadata based on usage control information regarding use control of the metadata; and using the metadata in the case where in said metadata use permission judgment, the use of the metadata is permitted. Specifically, the usage control information includes the first signer identification information which identifies the range of the provider of the metadata that can be used. The metadata includes a signature of the metadata provider identified in the first signer identification information, and the second signer identification information identifying the signer of the signature.

Abstract: A server apparatus includes a CPU, a RAM, a cipher processing unit for carrying out encryption and decryption, a communication processing unit for carrying out communication with an information processing terminal, and a data storage unit for storing information that does not require confidentiality. The server apparatus also includes a distribution information storage unit for storing information such as a program to be distributed, and a specific information distribution history holding unit for holding a specific information distribution history for managing a record of a program specific information of a program previously distributed to the information processing terminal.

Abstract: A content playback apparatus reduces load concentration on a specific server apparatus that manages content keys of encrypted content, while protecting copyrights of the content. The content apparatus makes playback of content recorded in a recording medium sold possible after the specific server breaks down. A key acquisition control unit (204) reads a playback control information table (211) from a recording medium (102) via a reading unit (201). The key acquisition unit (204) acquires a rights key via a key acquisition intermediation unit (223) from an apparatus specified by an acquisition-destination type and a request-destination type that are stored in the playback control information table (211) and that corresponding to the content to be played. The key acquisition unit (204) generates a content key using the acquired rights key and, when required, a medium key recorded in a medium. A decryption unit (203) decrypts encrypted content using the content key.

Abstract: The present invention provides a rights management terminal that can securely send and receive usage information while preventing spoofing and protecting user's privacy.

Abstract: An IC card (processing terminal) divides a process into process blocks, and holds a time period required for processing each process block. A receiver (receiving terminal) notifies the IC card of a time period which can be spent for processing non-real-time process data when causing the IC card to perform the processing. The IC card processes the process blocks which can be processed within the notified time period. After the processing, the IC card once sends a response back to the receiver, and then transitions into a state in which it can receive a new request. Accordingly, it becomes possible for the IC card to process real-time process data such as an ECM. In the case where the receiver continues the suspended processing, it notifies the IC card of the continuation of the processing so that it causes the IC card to continue the processing of non-real-time process data.

Abstract: When a secure counter malfunction detection unit 212 deters a malfunction in a secure counter 211, a content playability judgment unit 206 performs a content playability judgment based on information managed by a malfunctioning-state playback processing management unit 214. The malfunctioning-state playback processing management unit 214 stores a malfunctioning-state playback condition composed of information such as a playback count and a playback time. The content playability judgment unit 206 judges that content is playable when the malfunctioning-state playback condition is met, and a content playback unit 210 splays the content.

Abstract: A contents using device (or a terminal device) 300 is composed of: a license processing unit 305 which judges, on the basis of a usage rule of a license, whether or not the content is available; a content reproduction unit 304 which uses the content judged by the terminal device 300 to be available; a restriction unit (or a content reproduction unit 304) which restricts the license corresponding to the contents from being used by another source by reason that the license is currently in use, for a time period between a start and a normal end of the content usage by the content reproduction unit 304; an event detection unit 307 which detects a predetermined event that occurs between the start and the normal end of the content usage and that forcefully aborts the content usage; a restriction-relaxation necessity judgment unit (or a recovery/penalty judgment unit) 309 which judges whether or not the predetermined event is against an intention of a user; and a restriction relaxation unit (or a license recovery un

Abstract: A content usage management system includes a terminal device using content as digital production and a server device managing usage of the content on the terminal device. The server device includes a license information memory unit that memorizes license information indicating a usage rule of the content based on a user of the terminal device, and a license ticket issuance unit that generates a license ticket as right information indicating a part or all of a usage rule on the license information corresponding to the user based on a request from the user. The terminal device includes a requesting unit that requests usage of the content to the server device according to the user's designation, a receiving unit that receives the license ticket sent from the server device, and a content usage control unit that controls usage of the content according to the usage rule indicated on the received license ticket.

Abstract: 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.

Abstract: The present invention provides a content reproduction terminal which can be transformed between a general-purpose terminal and a members-only terminal. A content reproduction terminal 30a is composed of: an IC card slot into which a card 20a distributed to a membership user is to be inserted; an application/display-data acquisition unit 304a which sets the operation mode on the basis of a membership certificate 2020 showing a group, to which the user belongs, held previously in the card 20a; and a resident player application execution unit 305a and a member player application execution unit 308a which reproduce the content differently depending on the setting result given by the application/display-data acquisition unit 304a.