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    • 92. 发明授权
    • Group formation/management system, group management device, and member device
    • 集团组建/管理系统,集团管理设备和会员设备
    • US08386606B2
    • 2013-02-26
    • US12173531
    • 2008-07-15
    • Natsume MatsuzakiToshihisa AbeToshihisa NakanoYuichi FutaMasaya Miyazaki
    • Natsume MatsuzakiToshihisa AbeToshihisa NakanoYuichi FutaMasaya Miyazaki
    • G06F15/173
    • G06F21/10G06F2221/0706G06F2221/2103G06F2221/2117
    • 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.
    • 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。
    • 98. 发明授权
    • Digital work protection system
    • 数字化工作保护系统
    • US07693795B2
    • 2010-04-06
    • US10655129
    • 2003-09-05
    • Masato YamamichiNatsume MatsuzakiToshihisa AbeToshihisa NakanoMasaya Miyazaki
    • Masato YamamichiNatsume MatsuzakiToshihisa AbeToshihisa NakanoMasaya Miyazaki
    • G06F21/00
    • G06F21/10G11B20/00086G11B20/00115G11B20/00144G11B20/00195G11B20/0021G11B20/00347G11B20/00492G11B20/0071G11B20/0084
    • Disclosed is a digital work protection system enabling a content distributor to flexibly define usage patterns of content permitted for users. The system is composed of a recording device and a playback device. The recording device acquires a digital work, range information showing a permission range within which the digital work is permitted to be used, and a subrange key for each subrange, generates an encryption key using all the acquired subrange keys, encrypts the digital work based on the encryption key to generate encryption information, and writes the encryption information and the range information to a recording medium. The playback device reads the range information and the encrypted information from the recording medium, acquires a subrange key for each subrange, generates a decryption key using all the acquired subrange keys, decrypts the encrypted information based on the decryption key to generate a digital work, and plays the digital work.
    • 公开了一种数字作业保护系统,使得内容分发者能够灵活地定义允许用户使用的内容的使用模式。 该系统由记录装置和播放装置组成。 记录装置获取数字作品,示出允许使用数字作品的许可范围的范围信息和每个子范围的子类别密钥,使用所有获取的子分类密钥生成加密密钥,基于 用于生成加密信息的加密密钥,并将加密信息和范围信息写入记录介质。 播放装置从记录介质读取范围信息和加密信息,获取每个子范围的子范围密钥,使用所有获取的子范围密钥生成解密密钥,基于解密密钥解密加密信息以产生数字作业, 并播放数字作品。
    • 99. 发明授权
    • Group formation/management system, group management device, and member device
    • 集团组建/管理系统,集团管理设备和会员设备
    • US07441117B2
    • 2008-10-21
    • US10649678
    • 2003-08-28
    • Natsume MatsuzakiToshihisa AbeToshihisa NakanoYuichi FutaMasaya Miyazaki
    • Natsume MatsuzakiToshihisa AbeToshihisa NakanoYuichi FutaMasaya Miyazaki
    • H04L9/32
    • G06F21/10G06F2221/0706G06F2221/2103G06F2221/2117
    • A group formation/management system rigidly sets a group range, allows contents to be used freely among member devices in the group, and includes one or more registered member devices for holding common secret information unique to the group, a new member device for transmitting a request for registration in the group and receiving and holding common secret information, and a group management device for receiving the registration request from the new member device and, when the number of registered member devices is less than the maximum number of registerable member devices, outputting the common secret information to the new member device. Furthermore, because member devices are authenticated using the common secret information when contents are to be used, and contents are only delivered if the authentication is successful, member devices that do not hold the common secret information (i.e. unregistered member devices) can be prevented from using contents.
    • 群组形成/管理系统刚性地设置组范围,允许组内的成员设备之间自由使用内容,并且包括用于保存该组唯一的公用秘密信息的一个或多个注册成员设备,用于发送组 请求在组中注册并接收和保存公用秘密信息;以及组管理装置,用于从新成员设备接收注册请求,并且当注册成员设备的数量小于可注册成员设备的最大数量时,输出 向新成员设备的通用秘密信息。 此外,由于当使用内容时会使用公用秘密信息来认证成员设备,如果认证成功,则仅传送内容,因此可以防止不保存公用秘密信息的成员设备(即,未注册的成员设备) 使用内容。