Patent application number | Description | Published |
20090210709 | CONTENT TRANSMITTING AND RECEIVING SYSTEM - A transmitting apparatus transmits, to a receiving apparatus, a content that contains at least, in the stated order, a first portion that is encrypted with a shared key shared between the transmitting apparatus and the receiving apparatus, a second portion that is not encrypted, and a third portion that is encrypted with the shared key. In this situation, in the case where the encrypted third portion has become a transmission target after the second portion has been transmitted, and also, there is a possibility that the shared key stored in the receiving apparatus may be invalidated when the encrypted third portion is received, the transmitting apparatus sequentially transmits a fourth portion and the encrypted third portion to the receiving apparatus, the fourth portion containing at least element data that belongs to the last group in the second portion. | 08-20-2009 |
20100121966 | REPEATER AND REPEATING METHOD THEREOF - According to one embodiment, a repeater receives content data from a sender device through a first content protection technology and transmits the content data to another device through a second content protection technology. The repeater includes a receiver, a preparation module, and a transmitter. The receiver receives identification information that identifies a device compliant with the second content protection technology through the second content protection technology. The preparation module prepares an identification information list based on the first content protection technology that contains the identification information based on the second content protection technology received by the receiver and identification information based on the first content protection technology that identifies the repeater. The transmitter transmits the identification information list to the sender device through the first content protection technology. | 05-13-2010 |
20100275022 | TRANSMITTER, RECEIVER, AND CONTENT TRANSMITTING AND RECEIVING METHOD - According to one embodiment, a transmitter is configured to transmit content to a receiver. Available dubbing count is set in advance for the content such that the content can be dubbed a plurality of times. The transmitter includes a key exchanger, an encryption processor, and a dubbing management module. The key exchanger performs key exchange to share a common key with the receiver. The encryption processor encrypts, in response to a content request received from the receiver, the content with the common key to transmit the content to the receiver. The dubbing management module reduces, upon receipt of a right transfer request related to the use of the content from the receiver, the available dubbing count by dubbing count indicating the number of times of dubbing of the content. The dubbing count is contained in the right transfer request. | 10-28-2010 |
20100275023 | TRANSMITTER, RECEIVER, AND CONTENT TRANSMITTING AND RECEIVING METHOD - According to one embodiment, a transmitter configured to transmit content to a receiver. Available dubbing count is set in advance for the content such that the content can be dubbed a plurality of times. The transmitter includes a key exchanger, an encryption processor, and a management module. The key exchanger performs key exchange to share a common key with the receiver, and transmits the common key and at least one count label corresponding to the number of times of dubbing to the receiver. The encryption processor encrypts, in response to a content request for the content received from the receiver, the content with the common key to transmit the content to the receiver. The management module reduces the available dubbing count of the content upon each receipt of a right transfer request requesting to transfer right to use the content from the receiver, and transmits permission to the receiver to validate the right to use the content. | 10-28-2010 |
20110320824 | INFORMATION PROCESSING APPARATUS AND INFORMATION PROCESSING METHOD - An information processing method has a request determining part determining a request type for streaming contents from a communicating apparatus, a copy number managing part managing the number of copies permissible for the communicating apparatus when permission of one or more of copies of streaming contents is requested, a stream number managing part managing the number of streams now in communication when the request determining part determines that the communicating apparatus has requested transfer of streaming contents without asking permission of one or more of copies, and to make stop transfer of streaming contents if the number of streams now in communication exceeds a predetermined threshold value, a key-selection processing part selecting a first key corresponding to transfer of streaming contents permissible for one or more of copies or a second key corresponding to transfer of streaming contents for copies with generation management restriction or not permissible for copies, an encryption processing part generating encrypted streaming contents using the first or the second key, and a packet processing part generating a packet that includes the encrypted streaming contents and key information selected by the key-selection processing part and to include information on the number of copies to the packet when the first key is selected. | 12-29-2011 |
20120084558 | INFORMATION PROCESSING APPARATUS AND INFORMATION PROCESSING METHOD - An information processing apparatus has an authentication and key exchange processing unit, a packet selector, a content key generator, a content decryption unit to decrypt, based on the content key, the encrypted content which is included in the content packet and received following the CCI packet, a CCI set identifier management unit to manage a CCI identifier corresponding to recognizable copy control information, a CCI selector, a CCI analyzer to analyze copy control information corresponding to the CCI identifier selected by the CCI selector, a content processing unit to perform, based on an analysis result of the CCI analyzer, the receiving process on the content data corresponding to the content packet received following the CCI packet, a first communication connection unit to perform the authentication and key exchange process, and a second communication connection unit to transmit the content packet and the CCI packet. | 04-05-2012 |
Patent application number | Description | Published |
20090060196 | TRANSMITTING APPARATUS, RECEIVING APPARATUS, AND CONTENT TRANSMITTING METHOD - A transmitting apparatus includes a transaction transmitting unit configured to transmit to a receiving apparatus a content to be moved to the receiving apparatus, by using a first transaction established with the receiving apparatus, a counter unit configured to count a progress quantity representing a degree of progress of the transmission of the content from a given point of time with respect to the transmission of the content corresponding to the first transaction to obtain a count value, and a transaction switching unit configured to switch the first transaction used for the transmission of the content to a second transaction, if the count value of the counter unit reaches a predetermined value and the transmission of the content is not completed. | 03-05-2009 |
20090144549 | COPYRIGHT PROTECTION PROCESSING APPARATUS AND COPYRIGHT PROTECTION PROCESSING METHOD - According to one embodiment, a copyright protection processing apparatus is provided in a source device containing content items that are objects of copyright protection. The apparatus includes a network interface which is connected to a sink device which utilizes the content items, and a protection process section which executes mutual authentication for exchanging keys requested by the sink device in a state where a network connection is established with the sink device via the network interface and performs a protection process of encrypting the content items by the secret key shared as a result of successful mutual authentication and transmitting the encrypted content items to the sink device. A content list process section adds an item of error information to the content list to be transmitted to the sink device, upon failure in the mutual authentication. | 06-04-2009 |
20090169169 | VIDEO CONTENT RECORDING APPARATUS AND VIDEO CONTENT TRANSFER METHOD - According to one embodiment, a content recording apparatus includes a management module configured to manage information on content that is transferred from a source apparatus and stored in a storage device, and the content the source apparatus has, a recording module configured to record the content transferred from the source apparatus to the storage device in the inactive state and to retain the content in the source apparatus, and a control module configured to issue a command to the source apparatus based on the information on the content managed by the management module if the user determines that the content is used, the command being intended to deactivate content the source apparatus has, and configured to activate the content stored in the storage device in response to deactivation of the content the source apparatus has. | 07-02-2009 |
20090327726 | INFORMATION RECORDING/REPRODUCTION APPARATUS AND SYSTEM - According to one embodiment, a data transmission control section ends transmission of a title without copyright protection at time t | 12-31-2009 |
20110123176 | INFORMATION TRANSMITTING APPARATUS - According to one embodiment, an information transmitting apparatus includes a receiver, a management module, a transmitter, and an update module. The receiver is configured to receive a first content item in which a first viewable time is set. The management module is configured to manage the first content item and a remaining viewable time. The transmitter is configured to transmit a second content item and information of second viewable time to a device to which a duplicate is to be made, the second content item being a duplicate of the first content item and the information of the second viewable time defining a period of time during which the second content item can be viewed in the device. The update module is configured to update the remaining viewable time managed by the management module to a period of time obtained by subtracting the second viewable time. | 05-26-2011 |