Patent application number | Description | Published |
20080246859 | Imaging apparatus - An imaging apparatus for performing efficient signal processing depending on the operational mode. In the finder mode, a CCD interface | 10-09-2008 |
20090138714 | COMMUNICATION APPARATUS, KEY SERVER, MANAGEMENT SERVER, COMMUNICATION SERVER, CONTENT DISTRIBUTION SYSTEM, COMMUNICATION METHOD, AND RECORDING MEDIUM - A plurality of first encrypted pieces is generated by encrypting the pieces with a first encryption key. The second encrypted piece is generated by encrypting at least one of the pieces with a second encryption key. The first encryption key and the second encryption key for encrypting the same piece are different from each other. A communication apparatus receives a first encrypted piece or a second encrypted piece from other communication apparatus for each piece, transmits a request message for requesting a decryption key for decrypting the encrypted piece to a key server, and receives the decryption key from the key server in response to the request message. | 05-28-2009 |
20090216914 | Information Processing Apparatus and Information Processing Method - The present invention relates to an information processing apparatus capable of accurately controlling DMA transfer of a plurality of pieces of data present in a memory with a simple hardware configuration, and an information processing method for use therewith. A memory | 08-27-2009 |
20090249490 | COMMUNICATION APPARATUS, COMMUNICATION SYSTEM, TRANSMISSION METHOD, AND COMPUTER PROGRAM PRODUCT - A communication apparatus stores encrypted pieces having plural pieces as a part of a content encrypted, and number of transmission times. At least one first piece is encrypted by plural different encryption keys. The communication apparatus selects as priority pieces plural encrypted pieces corresponding to at least one first piece among the first pieces, based on number of untransmitted encrypted pieces of which number of transmission times is zero among plural encrypted pieces of which first piece is encrypted, and stores priority piece information specifying the priority piece. When a piece request is received from other communication apparatus, the communication apparatus determines an encrypted piece to be transmitted, based on priority piece information, and transmits the encrypted piece to the other communication apparatus. | 10-01-2009 |
20090282250 | COMMUNICATION APPARATUS, SERVER, AND COMPUTER PROGRAM PRODUCT THEREFOR - A communication apparatus receives, from another communication apparatus, a plurality of encrypted pieces obtained by encrypting a plurality of pieces constituting a part of a content and obtains a part or all of decryption keys used for decrypting the encrypted pieces. The communication apparatus also obtains an invalid piece list showing one or more identifiers of one or more encrypted pieces that can respectively be decrypted by using one or more decryption keys that have already been invalidated. In the case where at least one of the encrypted pieces is listed in the invalid piece list, the communication apparatus deletes the at least one of the encrypted pieces, based on an obtainment status of the encrypted pieces or an obtainment status of the decryption keys. | 11-12-2009 |
20100008509 | COMMUNICATION APPARATUS, KEY SERVER, AND MANAGEMENT SERVER - A communication apparatus obtains file information indicating all or a part of first and second encrypted pieces obtained by encrypting a plurality of pieces constituting a part of a content and version management information with which it is possible to judge whether the file information has validity and receives, for each of the pieces, one of the first encrypted piece and the second encrypted piece from another communication apparatus, by using the file information. The communication apparatus transmits, to a key server, a request message for requesting decryption keys each being used for decrypting the one of the first encrypted piece and the second encrypted piece received for a different one of the pieces and the version management information of the file information used to obtain the one of the first encrypted piece and the second encrypted piece in correspondence with each of the pieces and receives the decryption keys. | 01-14-2010 |
20110019059 | IMAGING APPARATUS - An imaging apparatus for performing efficient signal processing depending on the operational mode. In the finder mode, a CCD interface | 01-27-2011 |
20120274821 | IMAGING APPARATUS - An imaging apparatus for performing efficient signal processing depending on the operational mode. In the finder mode, a CCD interface | 11-01-2012 |