Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Sony Corporation

Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Co., Ltd.

Katsumi Tokuda

Ryuichi Okamoto

Kouji Miura

Hiroki Murakami

Masaya Yamamoto

Tohru Nakahara

Masayuki Kozuka

Masaki Igarashi

Naohisa Kitazato

Motoji Ohmori

Hideki Matsushima

Shinji Inoue

Mitsuhiro Inoue

Akio Higashi

Satoshi Niwano

Yasuaki Yamagishi

Yoshiharu Dewa

Shunji Harada

Teruto Hirota

Takuji Maeda

Susumu Kobayashi

Masaya Miyazaki

Yasushi Katayama

Tatsuya Shimoji

Yukie Shoda

Takakazu Shiomi

Hideki Kagemoto

Takuji Hiramoto

Masahiro Oho

Sen'ichi Onoda

Ryoichi Sugimura

Noboru Hirata

Masami Yamashita

When a secure counter malfunction detection unitdeters a malfunction in a secure counter, a content playability judgment unitperforms a content playability judgment based on information managed by a malfunctioning-state playback processing management unit. The malfunctioning-state playback processing management unitstores a malfunctioning-state playback condition composed of information such as a playback count and a playback time. The content playability judgment unitjudges that content is playable when the malfunctioning-state playback condition is met, and a content playback unitsplays the content.

Content reproducing device and content reproducing method

A user terminal () having a license purchase unit () obtaining a license () indicating a content usable time () of a content data () composed of a plurality of elements (), each of which can be replayed individually. The user terminal () also having an availability judgment unit () judging whether or not encrypted elements () included in the content data () are available, based on the content usable time () indicated in the obtained license (), and having a replay/display unit () replaying the encrypted elements judged as available. In addition, the user terminal () having a use status management unit () 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 () consumed by replaying the specified license-consuming elements.

Digital content reproducing apparatus and method thereof

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.

Multimedia-type contents reproduction device and reproduction method, and recording medium having stored thereon data used for the same

Content reproducing device and content preproducing method

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.

Content use management system, content use management method, and client device

A contents using device (or a terminal device)is composed of: a license processing unitwhich judges, on the basis of a usage rule of a license, whether or not the content is available; a content reproduction unitwhich uses the content judged by the terminal deviceto be available; a restriction unit (or a content reproduction unit) 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; an event detection unitwhich 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)which judges whether or not the predetermined event is against an intention of a user; and a restriction relaxation unit (or a license recovery unit)which relaxes the restriction on the content usage when the recovery/penalty judgment unitjudges that the predetermined event is against the intention of the user.

Contents using device, and contents using method

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 () reads a playback control information table () from a recording medium () via a reading unit (). The key acquisition unit () acquires a rights key via a key acquisition intermediation unit () from an apparatus specified by an acquisition-destination type and a request-destination type that are stored in the playback control information table () and that corresponding to the content to be played. The key acquisition unit () generates a content key using the acquired rights key and, when required, a medium key recorded in a medium. A decryption unit () decrypts encrypted content using the content key.

Content playback apparatus, content playback method, computer program, key relay apparatus, and recording medium

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.

Content distribution system and distribution method, and content processing device and processing method

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 () including a license server () which issues a license, a content server () which transmits the content, a terminal device () which controls use of the content based on the issued license. The terminal device () does not allow the use of the received encrypted content when it is judged that the encrypted content received from the content server () is not the content received in real time.

Terminal device, server device, and content distribution system

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. And, said metadata use permission judgment judges the metadata use permission based on the metadata provider identified in said first signer identification information, said second signer identification information, and signature verification.

Method for judging use permission of information and content distribution system using the method

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.

Server device and program management system

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.

Rights management terminal, server apparatus and usage information collection system

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.

Processing terminal, receiving terminal and received data processing system

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. The requesting unit makes a request by sending expected information indicating content to be requested and a usage volume of the content, and the license ticket issuance unit generates a license ticket according to the expected information sent from the requesting unit and sends the license ticket to the terminal device.

Content usage management system and server used in the system

A content using system is composed of a content importing apparatus and at least one content using apparatus. The content importing apparatus includes a content ID generating unit that generates a content ID, and a content key information encryption converting unit that converts the encryption of content key information by using an encryption key ('network key') that is shared in advance on the network. The content using apparatus includes a content key information decrypting unit that decrypts the content key information, whose encryption has been converted, by using the network key, a moved content list storing unit for storing a moved content list (MCL) in which the content IDs of contents that have been written onto a storage medium are written, and a moved content list managing unit that judges whether the writing of a content is permitted or prohibited based on the MCL.

Growing community of inventors

Ikeda, Japan

Katsumi Tokuda