Revocation information updating method, revocation information updating apparatus and storage medium
    3.
    发明授权
    Revocation information updating method, revocation information updating apparatus and storage medium 有权
    撤销信息更新方法,撤销信息更新装置和存储介质

    公开(公告)号:US06581160B1

    公开(公告)日:2003-06-17

    申请号:US09692800

    申请日:2000-10-20

    IPC分类号: H04L900

    摘要: A storage medium (PM) 13 includes a controller 130 and two types of storage regions, the concealed region 134 and the open region 131. The open region 131 includes an open RW 133 storing a digital content, an open ROM-W region 132a storing, as revocation information, identification information of an electronic appliance that is prohibited from accessing the digital content, and an open ROM region 132 storing, as master revocation information, identification information of an electronic appliance that is prohibited from updating the revocation information. When the storage medium is loaded into an electronic appliance that has identification information which is registered in the open ROM region 132, the controller 130 prohibits the electronic appliance from updating the revocation information.

    摘要翻译: 存储介质(PM)13包括控制器130和两种类型的存储区域,隐藏区域134和开放区域131.开放区域131包括存储数字内容的打开的RW133,存储有数字内容的开放ROM-W区域132a 作为撤销信息,禁止访问数字内容的电子设备的识别信息,以及作为主撤销信息存储被禁止更新撤销信息的电子设备的识别信息的开放ROM区域132。 当存储介质被装载到具有登记在开放ROM区域132中的识别信息的电子设备中时,控制器130禁止电子设备更新撤销信息。

    Revocation information updating method, revocation information updating apparatus and storage medium
    4.
    发明授权
    Revocation information updating method, revocation information updating apparatus and storage medium 有权
    撤销信息更新方法,撤销信息更新装置和存储介质

    公开(公告)号:US07392225B2

    公开(公告)日:2008-06-24

    申请号:US11010771

    申请日:2004-12-13

    IPC分类号: G06F17/60

    摘要: At least one set of revocation information for identifying electronic appliances that should be revoked for content protection and master revocation information for identifying electronic appliances that have special permission to update the revocation information are recorded in advance into a special storage region on a storage medium. When the storage medium is loaded into an electronic appliance indicated by the master revocation information, the revocation information can be updated. However, when the storage medium is loaded into an electronic appliance indicated by the revocation information, the electronic appliance is revoked and so the protection of contents is improved.

    摘要翻译: 至少一组用于识别用于内容保护的电子设备的撤销信息和用于识别具有更新撤销信息的特殊许可的电子设备的主撤销信息被预先记录在存储介质上的特殊存储区域中。 当存储介质被加载到由主撤销信息指示的电子设备中时,可以更新撤销信息。 然而,当将存储介质装载到由撤销信息指示的电子设备中时,电子设备被撤销,因此提高了对内容的保护。

    Contents management method, contents management apparatus, and recording medium
    10.
    发明授权
    Contents management method, contents management apparatus, and recording medium 有权
    内容管理方法,内容管理装置和记录介质

    公开(公告)号:US07505584B2

    公开(公告)日:2009-03-17

    申请号:US11406396

    申请日:2006-04-19

    IPC分类号: H04L9/00

    摘要: An apparatus generates first shared information that is shared by the apparatus and a recording medium by performing a first bilateral authentication. The apparatus encrypts overwrite data that is used to erase key information item recorded in the recording medium using the first shared information. Encrypted overwrite data is transferred to the recording medium. Second shared information is generated and shared by the apparatus and the recording medium by performing a second bilateral authentication between them. The apparatus receives data that is encrypted using the second shared information and that has been used by the recording medium for erasing key information. Encrypted data is decrypted using second shared information item and key information recorded in the recording medium is erased when the decrypted data is identical to overwrite data.

    摘要翻译: 设备通过执行第一双向认证来生成由设备和记录介质共享的第一共享信息。 该装置使用第一共享信息加密用于擦除记录在记录介质中的密钥信息项的重写数据。 加密的覆盖数据被传送到记录介质。 通过在它们之间执行第二双向认证,由设备和记录介质生成和共享第二共享信息。 该装置接收使用第二共享信息进行加密并且已由记录介质使用的用于擦除密钥信息的数据。 使用第二共享信息项解密加密数据,并且当解密的数据与覆盖数据相同时,擦除记录在记录介质中的密钥信息。