公开(公告)号：US07484090B2

公开(公告)日：2009-01-27

申请号：US10958551

申请日：2004-10-06

申请人： Motoji Ohmori ,  Makoto Tatebayashi ,  Hideshi Ishihara ,  Toshihisa Nakano

发明人： Motoji Ohmori ,  Makoto Tatebayashi ,  Hideshi Ishihara ,  Toshihisa Nakano

IPC分类号： H04L9/00

CPC分类号： G11B20/00086 ,  G11B20/0021 ,  G11B20/00231 ,  G11B20/00246 ,  G11B20/00347 ,  G11B20/00492 ,  G11B20/00521 ,  G11B20/00855 ,  H04L9/3268 ,  H04L2209/603 ,  H04N21/25875 ,  H04N21/26613 ,  H04N21/4623 ,  H04N21/63345 ,  H04N21/835

摘要： An encryption apparatus 100a including: a CRL storage unit 111 storing a CRL; a device key ring storage unit 112 storing a device key KD_A specific to each copyright protection module 210a used by a decryption apparatus 200a; a content key storage unit 113 storing a content key Kc that is a secret key for encrypting a content; a hashing function processing unit 114 calculating a hash value of the CRL stored in the CRL storage unit 111 according to a hashing function; and an Ex-OR unit 115 obtaining an exclusive OR value between the hash value and the device key KD_A. The encryption apparatus also includes an Enc unit 116 encrypting the content key Kc using an output value from the Ex-OR unit, and storing the hash value, the encrypted content key and the encrypted content in a DVD2a.

摘要翻译： 一种加密装置100a，包括：存储CRL的CRL存储单元111; 存储由解密装置200a使用的每个版权保护模块210a专用的设备密钥KD_A的设备密钥环存储单元112; 存储作为用于加密内容的秘密密钥的内容密​​钥Kc的内容密钥存储单元113; 哈希函数处理单元114，根据散列函数计算存储在CRL存储单元111中的CRL的哈希值; 和异或单元115获得哈希值和设备密钥KD_A之间的异或值。 加密装置还包括Enc单元116，其使用来自Ex-OR单元的输出值加密内容密钥Kc，并将散列值，加密内容密钥和加密内容存储在DVD2a中。

公开(公告)号：US07395425B2

公开(公告)日：2008-07-01

申请号：US10297089

申请日：2002-03-28

申请人： Toshihisa Nakano ,  Motoji Ohmori ,  Natsume Matsuzaki ,  Makoto Tatebayashi

发明人： Toshihisa Nakano ,  Motoji Ohmori ,  Natsume Matsuzaki ,  Makoto Tatebayashi

IPC分类号： G06F7/04 ,  G06F7/58 ,  G06F12/00 ,  G06F12/14 ,  G06F13/00

CPC分类号： H04L9/08 ,  G06F21/10 ,  G06F2221/2107 ,  G11B20/00086 ,  G11B20/0021 ,  H04L9/0822 ,  H04L9/0836 ,  H04L9/0891 ,  H04L63/064 ,  H04L63/065 ,  H04L2209/60 ,  H04L2209/80 ,  H04L2463/101 ,  H04N5/913 ,  H04N7/1675 ,  H04N21/2347 ,  H04N21/26606 ,  H04N21/4325 ,  H04N21/4405 ,  H04N2005/91364

摘要： A data protection system is provided that reduces, to a degree, the amount of encrypted data that is distributed to a plurality of terminals. In the data protection system a terminal whose decryption keys are exposed by a dishonest party is made to be unable to decrypt the data correctly, while other terminals are able to decrypt the data correctly.The data protection system includes a plurality of terminals, and an encryption device that encrypts distribution data distributed to each terminal. Each terminal is corresponded with one node on a lowest level of a 4-ary tree structure or the like having a plurality of hierarchies. The data protection system, for each node in the tree structure, excluding those on the lowest level, determines a plurality of combination patterns that include combinations of two or more of all four nodes that are reached one level below the node, decides an individual decryption key for each determined combination pattern, and decides an individual decryption key for each node on the lowest level. Further, the data protection system has each terminal store all decryption keys decided for the nodes on the path from the node on the lowest level that corresponds to the terminal through to the node on the highest level. The data protection system prescribes nodes that are reached from the node on the lowest level that corresponds to the terminal through to the node on the highest level that correspond to a terminal that has been dishonestly analyzed as invalid nodes. For invalid nodes, other than invalid nodes on the lowest level, the data protection system designates an encryption key that corresponds to the decryption key decided in correspondence with the combination pattern that combines all nodes, excluding invalid nodes, of the four nodes that are reached one level below the node, and has the encryption device encrypt distribution data that uses each of the designated encryption keys.

公开(公告)号：US07373503B2

公开(公告)日：2008-05-13

申请号：US10419251

申请日：2003-04-21

申请人： Toshihisa Nakano ,  Motoji Ohmori ,  Makoto Tatebayashi ,  Hideshi Ishihara

发明人： Toshihisa Nakano ,  Motoji Ohmori ,  Makoto Tatebayashi ,  Hideshi Ishihara

IPC分类号： H04L9/00

CPC分类号： G11B20/00086 ,  G11B20/0021 ,  H04L9/3268 ,  H04L2209/60

摘要： An authentication system is provided having a revocation list generation apparatus that constructs and stores a revocation list in a tree structure, the revocation list generation apparatus being used in combination with a revocation judgment apparatus. The authentication system improves upon conventional authentication systems because the memory capacity to store a Certificate Revocation List (CRL) in order to identify revoked certificates is reduced. The tree structure corresponds to public key certificate, which are identified by leaf identifies, and nodes from a leaf that corresponds to a revoked public key certificate.

摘要翻译： 提供一种认证系统，具有构造并存储树形结构中的撤销列表的撤销列表生成装置，撤销列表生成装置与撤销判断装置结合使用。 认证系统改进了常规认证系统，因为减少了用于存储证书吊销列表（CRL）以识别撤销证书的存储容量。 树结构对应于由叶标识识别的公钥证书，以及对应于撤销的公钥证书的叶的节点。

公开(公告)号：US20070283442A1

公开(公告)日：2007-12-06

申请号：US10587513

申请日：2005-02-01

申请人： Toshihisa Nakano ,  Motoji Ohmori ,  Kaoru Yokota ,  Shunji Harada ,  Yoshikatsu Ito ,  Kazuya Fujimura ,  Jun Takahashi

发明人： Toshihisa Nakano ,  Motoji Ohmori ,  Kaoru Yokota ,  Shunji Harada ,  Yoshikatsu Ito ,  Kazuya Fujimura ,  Jun Takahashi

IPC分类号： H04L9/00

CPC分类号： G11B20/0021 ,  G06F21/10 ,  G11B20/00086 ,  G11B20/00195 ,  G11B20/00246 ,  G11B20/00253 ,  G11B20/00507 ,  H04N5/913

摘要： A recording/reproduction device 10 receives content broadcast from a content provision device 11. The recording/reproduction device 10 encrypts the received content using a device key, to generate first encrypted content. The recording/reproduction device 10 decrypts the first encrypted content to obtain the content, performs an image conversion on the obtained content to generate converted content, and encrypts the converted content using a medium key to generate second encrypted content. The recording/reproduction device 10 writes the second encrypted content, the medium key, and the device key to a portable medium 14. When the portable medium 14 is inserted in a mobile information terminal 15, the mobile information terminal 15 decrypts the second encrypted content using the medium key to obtain the converted content, and reproduces the converted content.

摘要翻译： 记录/再现装置10从内容提供装置11接收内容广播。 记录/再现设备10使用设备密钥加密所接收的内容，以产生第一加密内容。 记录/再现设备10解密第一加密内容以获取内容，对所获得的内容执行图像转换以生成转换的内容，并且使用中密钥对转换的内容进行加密以生成第二加密内容。 记录/再现设备10将第二加密内容，媒体密钥和设备密钥写入便携式介质14。 当便携式媒体14被插入到移动信息终端15中时，移动信息终端15使用媒体密钥解密第二加密内容以获得转换的内容，并且再现转换的内容。

公开(公告)号：US20070256141A1

公开(公告)日：2007-11-01

申请号：US11790609

申请日：2007-04-26

申请人： Toshihisa Nakano ,  Masao Nonaka ,  Yuichi Futa ,  Motoji Ohmori ,  Ryo Nojima ,  Kazukuni Kobara ,  Hideki Imai

发明人： Toshihisa Nakano ,  Masao Nonaka ,  Yuichi Futa ,  Motoji Ohmori ,  Ryo Nojima ,  Kazukuni Kobara ,  Hideki Imai

IPC分类号： H04L9/32

CPC分类号： G06F21/16 ,  G06F21/10 ,  H04L9/14 ,  H04L9/3247 ,  H04L9/3263 ,  H04L2209/608

摘要： A content distribution system for transferring contents between transmission device and reception device. The transmission device includes: key obtaining unit that obtains, from reception device, public keys and public key identifiers; watermark embedding unit that embeds a different public key identifier, as electronic watermark, into each of contents that are identical in substance; an encryption unit that encrypts contents using public keys to generate encrypted contents; and transmission unit that transmits encrypted contents to reception device. The reception device includes: key storage unit storing public keys, public key identifiers, and a private key that makes a pair with one of the public keys; key transmission unit that transmits public keys and public key identifiers to the transmission device; content receiving unit that receives encrypted contents from transmission device; and decryption unit that obtains a content from the received encrypted contents, using the private key.

摘要翻译： 一种用于在传输设备和接收设备之间传送内容的内容分发系统。 传输设备包括：密钥获取单元，从接收设备获取公钥和公开密钥标识符; 水印嵌入单元，将不同的公钥标识符作为电子水印嵌入到实质上相同的每个内容中; 加密单元，其使用公共密钥对内容进行加密以生成加密内容; 以及将加密内容发送到接收装置的发送单元。 接收装置包括：存储公共密钥的密钥存储单元，公开密钥标识符和与公钥之一成对的专用密钥; 密钥发送单元，向发送装置发送公开密钥和公开密钥标识符; 从发送装置接收加密内容的内容接收单元; 以及使用所述私钥从所接收的加密内容中获取内容的解密单元。

公开(公告)号：US08369688B2

公开(公告)日：2013-02-05

申请号：US12304877

申请日：2007-06-19

申请人： Toshihisa Nakano ,  Shunji Harada ,  Masaya Yamamoto ,  Kaoru Murase ,  Tomoki Ogawa ,  Ryoji Suzuki ,  Hideshi Ishihara

发明人： Toshihisa Nakano ,  Shunji Harada ,  Masaya Yamamoto ,  Kaoru Murase ,  Tomoki Ogawa ,  Ryoji Suzuki ,  Hideshi Ishihara

IPC分类号： H04N9/80

CPC分类号： H04N21/835 ,  G06T1/0071 ,  G06T2201/0051 ,  G06T2201/0061 ,  G06T2201/0065 ,  G10L19/018 ,  H04N5/913 ,  H04N21/2541 ,  H04N21/4627 ,  H04N21/8358 ,  H04N2005/91335

摘要： The present invention provides an information embedding apparatus that is capable of preventing playback stop of a content that has been shot without intention of misuse. The information embedding apparatus comprises: an acquisition unit operable to acquire the content that is played back along the playback time-line; a watermark generating unit operable to generate the watermarks such that values held by the watermarks vary according to a first rule, the first rule showing that the values should vary according to a sequential order on the playback time-line; and an embedding unit operable to embed two or more of the watermarks into the content while keeping the sequential order.

摘要翻译： 本发明提供一种信息嵌入装置，其能够防止未被误用的拍摄内容的重放停止。 信息嵌入装置包括：获取单元，用于获取沿着播放时间线播放的内容; 水印生成单元，其可操作来生成水印，使得由水印保持的值根据第一规则而变化，第一规则表示值应当根据播放时间线上的顺序进行变化; 以及嵌入单元，用于将两个或更多个水印嵌入到内容中同时保持顺序。

公开(公告)号：US08171566B2

公开(公告)日：2012-05-01

申请号：US12514343

申请日：2008-02-22

申请人： Toshihisa Nakano ,  Kaoru Murase

发明人： Toshihisa Nakano ,  Kaoru Murase

IPC分类号： G06F7/04 ,  G06F17/30 ,  H04N7/16

CPC分类号： G11B23/283 ,  G06F21/10 ,  G11B20/00086 ,  G11B20/00094 ,  G11B20/00173 ,  G11B20/0021 ,  G11B20/00695 ,  G11B2220/213 ,  G11B2220/2537 ,  H04N5/85 ,  H04N5/913 ,  H04N2005/91342

摘要： If playback devices are prohibited from playing back contents recorded in R media, there occurs a problem that it takes more time to manufacture commercial ROM media. Conversely, if playback devices are permitted to play back contents recorded in R media, there occurs a problem that copyrights might be infringed. In view of these, the aim of the present invention is to provide a content protection data processing system and a playback device capable of determine whether to permit playback of a content recorded in a recording medium, based on a medium type of the recording medium and a signature type of a signature attached to a program. This enables both the protection of the copyright of the content and the efficient manufacturing of commercial ROM media.

摘要翻译： 如果播放设备被禁止播放记录在R媒体中的内容，则出现制造商业ROM媒体需要更多时间的问题。 相反，如果播放设备被允许播放记录在R媒体中的内容，则会出现可能侵犯版权的问题。 鉴于这些，本发明的目的是提供一种内容保护数据处理系统和回放装置，其能够基于介质类型的记录介质确定是否允许记录在记录介质中的内容的回放，以及 附加到程序的签名签名类型。 这既能保护内容的版权，又能实现商业ROM媒体的有效制造。

公开(公告)号：US20100122079A1

公开(公告)日：2010-05-13

申请号：US12446503

申请日：2008-09-09

申请人： Toshihisa Nakano ,  Masaya Yamamoto ,  Tomoyuki Okada ,  Masayuki Kozuka

发明人： Toshihisa Nakano ,  Masaya Yamamoto ,  Tomoyuki Okada ,  Masayuki Kozuka

IPC分类号： H04L9/32 ,  H04L29/06

CPC分类号： G06F21/10 ,  G06F21/121 ,  G06F21/51 ,  G06F2221/0771 ,  H04L9/3268 ,  H04L2209/603

摘要： The object of the present invention is to provide a reproduction apparatus that is capable of preventing personal information of users from being transmitted to an external apparatus that is under management of a malicious person.The reproduction apparatus uses a revocation list and a valid-content list in combination in order to prevent transmission of personal information of users. It is possible to prevent transmission of personal information by revoking certificates to be revoked because of being exposed or hacked at a certain timing, by listing them in the revocation list. Meanwhile, it is possible to allow use of contents that have been manufactured before the exposure, by listing them in the valid-content list. Accordingly, it is possible to realize both the security and the user convenience at the same time.

摘要翻译： 本发明的目的是提供一种能够防止用户的个人信息被传送到恶意管理者的外部设备的再现装置。 再现装置组合使用撤销列表和有效内容列表，以防止用户的个人信息的传输。 可以通过将它们放在撤销列表中，通过撤销由于在某个时间被暴露或被黑客而被吊销的证书来防止个人信息的传播。 同时，可以通过将它们列入有效内容列表中来允许使用在曝光之前制造的内容。 因此，可以同时实现安全性和用户便利性。

公开(公告)号：US20090245053A1

公开(公告)日：2009-10-01

申请号：US12282200

申请日：2007-07-30

申请人： Senichi Onoda ,  Toshihisa Nakano ,  Masayuki Kozuka

发明人： Senichi Onoda ,  Toshihisa Nakano ,  Masayuki Kozuka

IPC分类号： G11B20/18

CPC分类号： G11B20/00086 ,  G06F21/10 ,  G11B7/00736 ,  G11B7/00745 ,  G11B7/24082 ,  G11B7/261 ,  G11B7/263 ,  G11B19/125 ,  G11B20/00449 ,  G11B27/22 ,  G11B27/24 ,  G11B27/32 ,  G11B2020/1278 ,  G11B2220/218 ,  G11B2220/2562

摘要： Provided is a new-type recordable DVD medium characterized in having medium characteristics not defined in the DVD-R standards and-having compatibility with the DVD-ROM standards. Since information on the new-type recordable DVD medium can be played back by an existing player, even when content data protected by CSS (Content Scrambling System) is recorded on the new-type recordable DVD medium, the recordable DVD medium can be used for content distribution service using a kiosk terminal.

摘要翻译： 提供了一种新型可记录DVD介质，其特征在于具有在DVD-R标准中未定义且具有与DVD-ROM标准兼容的中等特性。 由于关于新型可记录DVD介质的信息可以由现有播放器播放，所以即使在由CSS（内容加扰系统）保护的内容数据被记录在新型可记录DVD介质上时，可记录DVD介质可以用于 内容分发服务使用信息亭终端。

公开(公告)号：US20050203853A1

公开(公告)日：2005-09-15

申请号：US10796972

申请日：2004-03-11

申请人： Masaya Yamamoto ,  Toshihisa Nakano ,  Ohmori Motoji ,  Masayuki Kozuka

发明人： Masaya Yamamoto ,  Toshihisa Nakano ,  Ohmori Motoji ,  Masayuki Kozuka

IPC分类号： H04L9/00

CPC分类号： G11B20/00086 ,  G11B20/0021 ,  G11B20/00449 ,  G11B20/00731 ,  G11B2220/2541

摘要： An encrypted content playback apparatus and a playback method suitable for content playback from a medium in which both content that is subject to conventional copy protection and content to which DRAM is applied exists, and a recording medium on which data used in the playback apparatus and the playback method is stored are disclosed. The medium stores information indicating, for each content, whether the content is content subject to conventional copy protection or content to which DRAM is applied. Based on this information, a playback apparatus determines the key to use to decrypt the content.

摘要翻译： 存在适用于内容再现的加密内容再现装置和播放方法，其中存在有常规复制保护的内容和应用于DRAM的内容的媒体存在的内容重放装置和重放装置中使用的数据的记录介质 公开了存储播放方法。 介质存储针对每个内容指示内容是否符合常规复制保护的内容或应用于DRAM的内容的信息。 基于该信息，重放装置确定用于解密内容的密钥。