DEVICE ARCHIVING OF PAST CLUSTER BINDING INFORMATION ON A BROADCAST ENCRYPTION-BASED NETWORK
    41.
    发明申请
    DEVICE ARCHIVING OF PAST CLUSTER BINDING INFORMATION ON A BROADCAST ENCRYPTION-BASED NETWORK 有权
    基于加密的基于网络的过滤器绑定信息的设备存档

    公开(公告)号:US20120131337A1

    公开(公告)日:2012-05-24

    申请号:US12950159

    申请日:2010-11-19

    IPC分类号: H04L9/32

    CPC分类号: H04L9/0866 H04L2209/601

    摘要: Provided are techniques for the creation and storage of an archive for binding IDs corresponding to a cluster of devices that render content protected by a broadcast encryption scheme. When two or more clusters are merged, a binding ID corresponding to one of the clusters is selected and a new management key is generated. Binding IDs associated with the clusters other than the cluster associated with the selected binding ID are encrypted using the new management key and stored on a cluster-authorized device in a binding ID archive. Content stored in conformity with an outdated binding ID is retrieved by decrypting the binding ID archive with the management key, recalculating an old management key and decrypting the stored content.

    摘要翻译: 提供了用于创建和存储用于绑定ID的存档的技术,所述绑定ID对应于呈现由广播加密方案保护的内容的设备的集群。 当两个或更多个集群合并时,选择与一个集群对应的绑定ID,并生成新的管理密钥。 与除与所选绑定ID相关联的集群之外的集群相关联的绑定ID使用新的管理密钥加密并存储在绑定ID归档中的集群授权设备上。 通过用管理密钥解密绑定ID档案,重新计算旧的管理密钥并解密所存储的内容来检索与过时的绑定ID一致的存储的内容。

    Key management system for digital content player
    46.
    发明授权
    Key management system for digital content player 有权
    数字内容播放器的密钥管理系统

    公开(公告)号:US06398245B1

    公开(公告)日:2002-06-04

    申请号:US09203307

    申请日:1998-12-01

    IPC分类号: G06F1700

    摘要: A method of managing keys used by a digital content player on a computer system. According to the method, digital content data encrypted with a first encrypting key is decrypted using a first decrypting key, and re-encrypted using a second encrypting key. A second decrypting key is encrypted using a third encrypting key to produce an encrypted second decrypting key. In one preferred method, an encrypted first decrypting key that was encrypted using a fourth encrypting key is received, and the encrypted first decrypting key is decrypted using a fourth decrypting key to reproduce the first decrypting key. A digital content player for use on a computer system is also provided. The content player includes a decrypter that decrypts digital content data, which was encrypted with a first encrypting key, using a first decrypting key so as to produce the content data. An encrypter re-encrypts the content data using a second encrypting key and encrypts a second decrypting key using a third encrypting key. In one preferred content player, a receiver receives an encrypted first decrypting key that was encrypted using a fourth encrypting key, and the decrypter decrypts the encrypted first decrypting key using a fourth decrypting key to reproduce the first decrypting key.

    摘要翻译: 一种管理数字内容播放器在计算机系统上使用的密钥的方法。 根据该方法,使用第一解密密钥解密用第一加密密钥加密的数字内容数据,并使用第二加密密钥重新加密。 使用第三加密密钥对第二解密密钥进行加密,以产生加密的第二解密密钥。 在一个优选方法中,接收使用第四加密密钥加密的加密的第一解密密钥,并且使用第四解密密钥对加密的第一解密密钥进行解密,以再现第一解密密钥。 还提供了用于计算机系统的数字内容播放器。 内容播放器包括解密器,其使用第一解密密钥对用第一加密密钥加密的数字内容数据进行解密,以产生内容数据。 加密器使用第二加密密钥重新加密内容数据,并使用第三加密密钥加密第二解密密钥。 在一个优选的内容播放器中,接收器接收使用第四加密密钥加密的加密的第一解密密钥,并且解密器使用第四解密密钥对加密的第一解密密钥进行解密,以再现第一解密密钥。