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    Management apparatus, terminal apparatus, and copyright protection system
    1.
    发明授权
    Management apparatus, terminal apparatus, and copyright protection system 有权
    管理设备，终端设备和版权保护系统

    公开(公告)号：US08180059B2

    公开(公告)日：2012-05-15

    申请号：US10578892

    申请日：2004-11-25

    申请人： Toshihisa Nakano ,  Nuttapong Attrapadung ,  Kazukuni Kobara ,  Hideki Imai

    发明人： Toshihisa Nakano ,  Nuttapong Attrapadung ,  Kazukuni Kobara ,  Hideki Imai

    IPC分类号： H04L9/00 ,  H04N7/167 ,  H04L29/06

    CPC分类号： H04L9/0891 ,  H04L9/0822 ,  H04L9/0836 ,  H04L2209/605

    摘要： A management apparatus reduces the number of pieces of unique information each not generated from another piece of unique information, among unique information being bases of keys assigned to managed apparatuses.The management apparatus calculates, for nodes in layers other than tree structure leaves, subsets of apparatus identifiers subordinate to the nodes, searches for a subset wholly containing another subset in the lowermost layer other than a leaf layer from an immediately-upper layer and mutually associates these subsets, searches for another subset wholly containing the containing subset from a same or an immediately-upper layer and mutually associates these subsets, controls this processing to repeat up to the uppermost layer, controls these processings to repeat on all subsets in the lowermost layer, makes unique information correspond to subsets in the lowermost layer, and makes information derivatively obtained from the unique information correspond to subsets connected due to the associating.

    摘要翻译： 管理装置在分配给受管理装置的密钥的基础的唯一信息中，减少不是从另一条唯一信息生成的唯一信息的数量。 管理装置对于除树结构叶以外的层中的节点计算从属于节点的设备标识符的子集，搜索完全包含来自最上层的叶层以外的最下层中的另一个子集的子集，并且相互关联 这些子集搜索完全包含来自相同或立即上层的含有子集的另一个子集并且相互关联这些子集，控制该处理重复到最上层，控制这些处理在最下层的所有子集上重复 使得唯一信息对应于最下层中的子集，并且使得从唯一信息导出的信息对应于由于关联而连接的子集。

    Management apparatus, terminal apparatus, and copyright protection system
    2.
    发明申请
    Management apparatus, terminal apparatus, and copyright protection system 有权
    管理设备，终端设备和版权保护系统

    公开(公告)号：US20070067622A1

    公开(公告)日：2007-03-22

    申请号：US10578892

    申请日：2004-11-25

    申请人： Toshihisa Nakano ,  Nuttapong Attrapadung ,  Kazukuni Kobara ,  Hideki Imai

    发明人： Toshihisa Nakano ,  Nuttapong Attrapadung ,  Kazukuni Kobara ,  Hideki Imai

    IPC分类号： H04L9/00

    CPC分类号： H04L9/0891 ,  H04L9/0822 ,  H04L9/0836 ,  H04L2209/605

    摘要： A management apparatus reduces the number of pieces of unique information each not generated from another piece of unique information, among unique information being bases of keys assigned to managed apparatuses. The management apparatus calculates, for nodes in layers other than tree structure leaves, subsets of apparatus identifiers subordinate to the nodes, searches for a subset wholly containing another subset in the lowermost layer other than a leaf layer from an immediately-upper layer and mutually associates these subsets, searches for another subset wholly containing the containing subset from a same or an immediately-upper layer and mutually associates these subsets, controls this processing to repeat up to the uppermost layer, controls these processings to repeat on all subsets in the lowermost layer, makes unique information correspond to subsets in the lowermost layer, and makes information derivatively obtained from the unique information correspond to subsets connected due to the associating.

    摘要翻译： 管理装置在分配给受管理装置的密钥的基础的唯一信息中，减少不是从另一条唯一信息生成的唯一信息的数量。 管理装置对于除树结构叶以外的层中的节点计算从属于节点的设备标识符的子集，搜索完全包含来自最上层的叶层以外的最下层中的另一个子集的子集，并且相互关联 这些子集搜索完全包含来自相同或立即上层的含有子集的另一个子集并且相互关联这些子集，控制该处理重复到最上层，控制这些处理在最下层的所有子集上重复 使得唯一信息对应于最下层中的子集，并且使得从唯一信息导出的信息对应于由于关联而连接的子集。

    Copyright protection system, modular exponentiation operation apparatus, and modular exponentiation operation method
    4.
    发明授权
    Copyright protection system, modular exponentiation operation apparatus, and modular exponentiation operation method 有权
    版权保护制度，模幂运算装置和模幂运算法

    公开(公告)号：US07925893B2

    公开(公告)日：2011-04-12

    申请号：US10557723

    申请日：2004-05-24

    申请人： Toshihisa Nakano ,  Attrapadung Nuttapong ,  Kazukuni Kobara ,  Hideki Imai

    发明人： Toshihisa Nakano ,  Attrapadung Nuttapong ,  Kazukuni Kobara ,  Hideki Imai

    IPC分类号： G06F11/30 ,  G06F12/14

    CPC分类号： G11B20/00086 ,  G11B20/0021

    摘要： A copyright protection system is provided that keeps manufacturing costs down regardless of the total number of playback apparatuses belonging to the system. In this system, a device key generating unit of a key management apparatus performs a modular exponentiation operation on a random number with an inverse element of a product of predetermined prime numbers, so as to generate and distribute device keys to playback apparatuses in one-to-one correspondence. A key revocation data generating unit generates, as key revocation data, information identifying the prime numbers used by an unrevoked playback apparatus to generate a decryption key from its device key and distributes the key revocation data along with an encrypted content to each playback apparatus. Playback apparatuses each attempt to generate a description key based on the key revocation data, and only those playback apparatuses that have successfully generated a decryption key are able to decrypt the encrypted content.

    摘要翻译： 提供了一种版权保护系统，其保持制造成本降低，而不管属于系统的回放装置的总数。 在该系统中，密钥管理装置的设备密钥生成单元对具有预定素数的乘积的逆元素的随机数执行模幂运算，以便将设备密钥生成并分发到重放设备 一个通信。 密钥吊销数据生成单元生成作为关键吊销数据的信息，识别由未被复原的重放装置使用的质数从其装置密钥生成解密密钥的信息，并将密钥吊销数据与加密的内容一起分发给每个重放装置。 回放装置各自尝试基于密钥吊销数据生成描述密钥，并且只有那些已经成功生成解密密钥的那些重放装置能够解密加密的内容。

    Unauthorized Device Detection Device, Unauthorized Device Detection System, Unauthorized Device Detection Method, Program, Recording Medium, and Device Information Update Method
    5.
    发明申请
    Unauthorized Device Detection Device, Unauthorized Device Detection System, Unauthorized Device Detection Method, Program, Recording Medium, and Device Information Update Method 有权
    未经授权的设备检测设备，未经授权的设备检测系统，未经授权的设备检测方法，程序，记录介质和设备信息更新方法

    公开(公告)号：US20070283162A1

    公开(公告)日：2007-12-06

    申请号：US10589288

    申请日：2005-12-12

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

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

    IPC分类号： H04L9/08 ,  G06F21/20 ,  H04N7/16 ,  H04N7/167 ,  G06F21/24

    CPC分类号： H04L9/083 ,  G06F21/10 ,  G06F2221/0764 ,  G11B20/00086 ,  G11B20/00195 ,  G11B20/0021 ,  G11B20/00528 ,  G11B20/00688 ,  G11B20/00862 ,  G11B2220/2562 ,  H04L9/0822 ,  H04L2209/60

    摘要： An unauthorized apparatus detection device, playback device, unauthorized apparatus detection system, information collection device, unauthorized apparatus detection method, a program, recording medium, apparatus information update method, and integrated circuit can detect clones of a playback device. In a management server 2, a reception processing unit 241 acquires a user terminal identifier and a first random number from a user terminal targeted for unauthorized apparatus detection, judges whether a second management server random number, which is stored in a storage unit 23 in correspondence with the user terminal identifier, matches the first user terminal random number. If the two fail to match, a display unit 22 displays a message indicating that a clone exists. If the two match, a terminal information generation unit 243 generates a new random number, and writes the generated random number as the second random number in the storage unit 23. A transmission processing unit 246 transmits the generated random number to the user terminal via a transmission/reception unit 246 and the user terminal updates the first user terminal random number to the generated random number.

    摘要翻译： 未经授权的装置检测装置，回放装置，未经授权的装置检测系统，信息收集装置，未经授权的装置检测方法，程序，记录介质，装置信息更新方法和集成电路可以检测回放装置的克隆。 在管理服务器2中，接收处理单元241从针对未授权设备检测的用户终端获取用户终端标识符和第一随机数，判断存储在存储单元23中的第二管理服务器随机数是否对应 用户终端标识符与第一用户终端随机数匹配。 如果两者不匹配，则显示单元22显示指示克隆存在的消息。 如果两者匹配，终端信息生成单元243生成新的随机数，并将所生成的随机数作为第二随机数写入存储单元23。 发送处理单元246经由发送/接收单元246将生成的随机数发送给用户终端，并且用户终端将第一用户终端随机数更新为所生成的随机数。

    Content distribution system
    6.
    发明授权
    Content distribution system 有权
    内容分发系统

    公开(公告)号：US08601590B2

    公开(公告)日：2013-12-03

    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： G06F21/00 ,  G06F21/16 ,  G06F21/10

    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; 以及使用私钥从所接收的加密内容中获取内容的解密单元。

    Content distribution system
    8.
    发明申请
    Content distribution system 有权
    内容分发系统

    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。

    Copyright protection system, modular exponentiation operation apparatus, and modular exponentiation operation method
    9.
    发明申请
    Copyright protection system, modular exponentiation operation apparatus, and modular exponentiation operation method 有权
    版权保护制度，模幂运算装置和模幂运算法

    公开(公告)号：US20070147603A1

    公开(公告)日：2007-06-28

    申请号：US10557723

    申请日：2004-05-24

    申请人： Toshihisa Nakano ,  Attrapadung Nuttapong ,  Kazukuni Kobara ,  Hideki Imai

    发明人： Toshihisa Nakano ,  Attrapadung Nuttapong ,  Kazukuni Kobara ,  Hideki Imai

    IPC分类号： H04L9/28

    CPC分类号： G11B20/00086 ,  G11B20/0021

    摘要： A copyright protection system is provided that keeps manufacturing costs down regardless of the total number of playback apparatuses belonging to the system. In this system, a device key generating unit of a key management apparatus performs a modular exponentiation operation on a random number with an inverse element of a product of predetermined prime numbers, so as to generate and distribute device keys to playback apparatuses in one-to-one correspondence. A key revocation data generating unit generates, as key revocation data, information identifying the prime numbers used by an unrevoked playback apparatus to generate a decryption key from its device key and distributes the key revocation data along with an encrypted content to each playback apparatus. Playback apparatuses each attempt to generate a description key based on the key revocation data, and only those playback apparatuses that have successfully generated a decryption key are able to decrypt the encrypted content.

    摘要翻译： 提供了一种版权保护系统，其保持制造成本降低，而不管属于系统的回放装置的总数。 在该系统中，密钥管理装置的设备密钥生成单元对具有预定素数的乘积的逆元素的随机数执行模幂运算，以便将设备密钥生成并分发到重放设备 一个通信。 密钥吊销数据生成单元生成作为关键吊销数据的信息，识别由未被复原的重放装置使用的质数从其装置密钥生成解密密钥的信息，并将密钥吊销数据与加密的内容一起分发给每个重放装置。 回放装置各自尝试基于密钥吊销数据生成描述密钥，并且只有那些已经成功生成解密密钥的那些重放装置能够解密加密的内容。