Content playback apparatus, content playback method, and program
    22.
    发明申请
    Content playback apparatus, content playback method, and program 有权
    内容播放装置,内容播放方法和程序

    公开(公告)号:US20050018854A1

    公开(公告)日:2005-01-27

    申请号:US10868872

    申请日:2004-06-17

    IPC分类号: G06F21/10 G11B20/00 H04N7/167

    摘要: A content playback apparatus prevents related content recorded on separate media that make up a virtual package from being played separately, thereby restricting playback of the content to only when the virtual package is assembled as intended by the creator, and protecting copyright of the content. A key obtaining unit obtains a second key, with use of key management information recorded on a recording medium on which related content relating to the encrypted content is also recorded. An information obtaining unit obtains the encrypted content and key generation information that relates to generation of the first key, from a source other than the recording medium. A key generation unit generates the first key with use of the second key and the obtained key generation information. A decryption unit decrypts the encrypted content with use of the first key.

    摘要翻译: 内容播放装置防止记录在构成虚拟包的单独媒体上的相关内容被单独播放,从而仅当虚拟包按照创作者的意图进行组合并且保护内容的版权时才限制内容的播放。 密钥获取单元使用记录在与记录与加密内容相关的相关内容的记录介质上的密钥管理信息来获得第二密钥。 信息获取单元从除了记录介质之外的源获得与生成第一密钥相关的加密内容和密钥生成信息。 密钥生成单元使用第二密钥和获得的密钥生成信息生成第一密钥。 解密单元利用第一密钥解密加密的内容。

    Content use device and recording medium
    23.
    发明授权
    Content use device and recording medium 有权
    内容使用装置和记录介质

    公开(公告)号:US08428435B2

    公开(公告)日:2013-04-23

    申请号:US12796077

    申请日:2010-06-08

    IPC分类号: H04N9/80

    CPC分类号: G11B20/00086 G11B27/105

    摘要: To provide a content playback device that can use content appropriately by avoiding output of content not permitted to be used according to contract information. A playback control unit 102 extracts a content name from playback control information in a playback path information table 210, and inquires of a rights management unit 108 whether content identified by the extracted content name is playable or not. If the content is judged as being unplayable, the playback control unit 102 extracts an alternative playback number from the playback control information, and extracts a content name from playback control information whose playback number matches the alternative playback number. The playback control unit 102 then instructs a decryption unit 103 and a playback unit 107 to decrypt and play back encrypted content identified by the extracted content name.

    摘要翻译: 提供可以通过避免根据合同信息输出不允许使用的内容来适当地使用内容的内容回放设备。 回放控制部102从回放路径信息表210中的回放控制信息中提取内容名,并向权利管理部108询问由所提取的内容名称识别的内容是否可以播放。 如果内容被判断为不可播放,则播放控制单元102从播放控制信息中提取备选重放号码,并且从播放数量与替代重放号码匹配的播放控制信息中提取内容名称。 再现控制单元102然后指示解密单元103和重放单元107解密和重放由所提取的内容名称标识的加密内容。

    Storage medium rental system
    27.
    发明申请
    Storage medium rental system 审中-公开
    存储介质租赁系统

    公开(公告)号:US20050234826A1

    公开(公告)日:2005-10-20

    申请号:US10517444

    申请日:2003-09-05

    摘要: A storage-medium rental system includes a portable storage medium to be rented to the user, a portable semiconductor memory owned by the user, a rental-shop apparatus owned by the rental agent, and a playback apparatus owned by the user. The storage medium prestores encrypted content generated by encrypting digital work using a content encryption key. The semiconductor memory has an area f or securely storing a content decryption key. The rental-shop apparatus stores a content decryption key for decrypting the encrypted content. The rental-shop apparatus writes the content decryption key to the semiconductor memory. The playback apparatus securely reads the content decryption key from the semiconductor memory, reads the encrypted content from the storage medium, decrypts the encrypted content using the content decryption key, and plays back the decrypted content.

    摘要翻译: 存储介质租赁系统包括要向用户租用的便携式存储介质,由用户拥有的便携式半导体存储器,由租赁代理人拥有的租赁店设备以及由用户拥有的播放设备。 存储介质通过使用内容加密密钥来预加密数字作品加密产生的加密内容。 半导体存储器具有区域f或安全地存储内容解密密钥。 出租店设备存储用于解密加密内容的内容解密密钥。 租用店铺装置将内容解密密钥写入半导体存储器。 回放装置从半导体存储器安全地读取内容解密密钥,从存储介质读取加密的内容,使用内容解密密钥解密加密的内容,并且回放解密的内容。

    Content playback device
    29.
    发明授权
    Content playback device 有权
    内容播放设备

    公开(公告)号:US07933409B2

    公开(公告)日:2011-04-26

    申请号:US10590909

    申请日:2005-03-01

    IPC分类号: H04N7/167 H04L9/00 G06F11/30

    摘要: To provide a content playback device capable of protecting content according to DRM, when decrypting encrypted content recorded on a recording medium and playing the decrypted content. If key generation information is “00”, a key control unit 104 concatenates a decrypted media key and content information in this order, and applies a one-way function to the concatenation result to generate a content key. If the key generation information is “10”, the key control unit 104 sets a rights key as the content key. If the key generation information is “01”, the key control unit 104 concatenates the decrypted media key and the rights key in this order, and applies a one-way function to the concatenation result to generate the content key.

    摘要翻译: 为了提供能够根据DRM保护内容的内容回放设备,当解密记录在记录介质上的加密内容并播放解密的内容时。 如果密钥生成信息是“00”,则密钥控制单元104依次连接解密的媒体密钥和内容信息,并且向连接结果应用单向函数以生成内容密钥。 如果密钥生成信息是“10”,则密钥控制单元104设置权限密钥作为内容密钥。 如果密钥生成信息为“01”,则密钥控制单元104依次连接解密的媒体密钥和权限密钥,并将单向功能应用于连接结果以生成内容密钥。