Group formation/management system, group management device, and member device
    2.
    发明授权
    Group formation/management system, group management device, and member device 有权
    集团组建/管理系统,集团管理设备和会员设备

    公开(公告)号:US08386606B2

    公开(公告)日:2013-02-26

    申请号:US12173531

    申请日:2008-07-15

    IPC分类号: G06F15/173

    摘要: A group management device provides with a content a device included in a group managed by the group management device. The group management device includes a storage unit that stores a total number of remote device that the group management device currently registers, a maximum number of remote devices that the group management device is permitted to register, a total number of local device that the group management device currently registers, and a maximum number of local devices that the group management device is permitted to register. The group management device also includes a judging unit that judges whether the total number of the remote device exceeds the maximum number of the remote devices when it is judged that the one device is the remote device. The judging unit judges whether the total number of the local device exceeds the maximum number of the local devices when it is judged that the one device is the local device.

    摘要翻译: 组管理装置向组管理装置管理的组中包含的装置提供内容。 组管理装置包括存储单元,存储组管理装置当前登记的远程设备的总数,组管理装置允许登记的最大数量的远程设备,组管理的本地设备的总数 设备当前注册,允许组管理设备注册的本地设备的最大数量。 组管理装置还包括判断单元,当判断为一个设备是远程设备时,该判断单元判断远程设备的总数是否超过远程设备的最大数量。 当判断为一个设备是本地设备时,判断单元判断本地设备的总数是否超过本地设备的最大数量。

    Content playback apparatus, content playback method, computer program, key relay apparatus, and recording medium
    3.
    发明授权
    Content playback apparatus, content playback method, computer program, key relay apparatus, and recording medium 有权
    内容再现装置,内容再现方法,计算机程序,密钥中继装置和记录介质

    公开(公告)号:US07940935B2

    公开(公告)日:2011-05-10

    申请号:US11629352

    申请日:2005-06-30

    IPC分类号: H04L9/08

    摘要: A content playback apparatus reduces load concentration on a specific server apparatus that manages content keys of encrypted content, while protecting copyrights of the content. The content apparatus makes playback of content recorded in a recording medium sold possible after the specific server breaks down. A key acquisition control unit (204) reads a playback control information table (211) from a recording medium (102) via a reading unit (201). The key acquisition unit (204) acquires a rights key via a key acquisition intermediation unit (223) from an apparatus specified by an acquisition-destination type and a request-destination type that are stored in the playback control information table (211) and that corresponding to the content to be played. The key acquisition unit (204) generates a content key using the acquired rights key and, when required, a medium key recorded in a medium. A decryption unit (203) decrypts encrypted content using the content key.

    摘要翻译: 内容再现装置降低对管理加密内容的内容密钥的特定服务器装置的负载集中,同时保护内容的版权。 在特定服务器故障之后,内容设备使得记录在记录介质中的内容的播放成为可能。 密钥获取控制单元(204)经由读取单元(201)从记录介质(102)读取重放控制信息表(211)。 密钥获取单元(204)经由密钥获取中介单元(223)从由存储在播放控制信息表(211)中的获取目的地类型和请求 - 目的地类型指定的设备获取权限密钥,并且 对应于要播放的内容。 密钥获取单元(204)使用所获取的权限密钥和需要时记录在介质中的密钥生成内容密钥。 解密单元(203)使用内容密钥来解密加密的内容。

    Content-duplication management system, apparatus and method, playback apparatus and method, and computer program
    6.
    发明授权
    Content-duplication management system, apparatus and method, playback apparatus and method, and computer program 失效
    内容复制管理系统,装置和方法,播放装置和方法以及计算机程序

    公开(公告)号:US07752433B2

    公开(公告)日:2010-07-06

    申请号:US10649624

    申请日:2003-08-28

    IPC分类号: H04L29/06

    摘要: A content management system formed from a playback apparatus that requests and plays content, and a content management apparatus that manages duplication and deletion of content. The playback apparatus notifies group information of the playback apparatus to the content management apparatus, acquires information from the content management apparatus showing whether requests are permitted, and duplicates/deletes content. By judging whether the playback apparatus belongs to a group, and notifying whether a duplication request is permitted or rejected, based on in-group and out-group remaining numbers that show the remaining number of duplications permitted of apparatuses in-group and out-group, respectively, the content management apparatus relaxes restrictions on in-group content duplication as compared with out-group content duplication, and thus improves convenience for users in a home network, while protecting the rights of copyright holders, with respect to content duplication and usage.

    摘要翻译: 由请求和播放内容的播放装置形成的内容管理系统以及管理内容的复制和删除的内容管理装置。 回放装置向内容管理装置通知播放装置的组信息,从内容管理装置获取表示是否允许请求的信息,并且复制/删除内容。 通过判断播放装置是否属于一个组,并且基于组内和组外剩余的数字来通知复制请求是否被允许或拒绝,所述剩余数字表示组内和组外的设备允许的剩余重复次数 内容管理装置与组外内容复制相比,放松了组内内容复制的限制,从而提高了家庭网络用户的便利性,同时在保护版权持有人的权利方面相对于内容复制和使用 。