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    • 2. 发明授权
    • Key management system for digital content player
    • 数字内容播放器的密钥管理系统
    • US06398245B1
    • 2002-06-04
    • US09203307
    • 1998-12-01
    • George Gregory GruseMarco M. HurtadoKenneth Louis MilstedJeffrey B. Lotspiech
    • George Gregory GruseMarco M. HurtadoKenneth Louis MilstedJeffrey B. Lotspiech
    • G06F1700
    • G06F21/10G06F2221/0737G06F2221/2135G06Q20/3674G06Q20/382G06Q20/3829G06Q30/0617G06Q30/0623G06Q30/0633H04L9/0822H04L9/0825H04L63/0428H04L67/18H04L69/329H04L2209/603H04L2463/101H04L2463/102H04W4/02
    • 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.
    • 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。
    • 5. 发明授权
    • Secure electronic content distribution on CDS and DVDs
    • 在CDS和DVD上安全的电子内容分发
    • US06611812B2
    • 2003-08-26
    • US09376102
    • 1999-08-17
    • Marco M. HurtadoKenneth L. MilstedGeorge G. GruseEdgar DownsChristopher T. LehmanRichard L. SpagnaJeffrey B. Lotspiech
    • Marco M. HurtadoKenneth L. MilstedGeorge G. GruseEdgar DownsChristopher T. LehmanRichard L. SpagnaJeffrey B. Lotspiech
    • G06F1760
    • H04L69/04G06F21/10G06F2211/007G06F2221/0737G06F2221/2107G06F2221/2135G06Q20/3821G06Q20/401H04L63/0428H04L67/18H04L69/329H04L2463/101H04L2463/102H04W4/02
    • A method to delivery encrypted digital content to a end user system for playing the content comprising the steps of: reading from a computer readable medium metadata which has previously associated with the content. A user selects from the metadata associated content to decrypt and the end user system establishes a secure connection with an authorization authority for decrypting the content. The end user system receives a secure container containing the decrypting key for decrypting at least part of the previously encrypted content as permitted. The system creates a secure container using the encrypting key from a clearing house, wherein the secure container has an encrypting key therein from the end user system; transferring the secure container to the clearing house for authentication of permission to decrypt the content. The system receives from the clearing house, a secure container encrypted using the encrypting key of the end user system containing the decrypting key for decrypting at least part of the previously encrypted content stored on the computer readable medium as permitted; and playing at least part of the previously encrypted content by decrypting the secure container using the encrypting key of the end user system to access the decrypting key for decrypting at least part of the encrypted content.
    • 一种将加密的数字内容传送到用于播放内容的最终用户系统的方法,包括以下步骤:从计算机可读介质读取先前与内容相关联的元数据。 用户从元数据相关联的内容中进行选择以进行解密,并且最终用户系统与用于解密内容的授权机构建立安全连接。 最终用户系统接收包含解密密钥的安全容器,用于在允许的情况下解密至少部分先前加密的内容。 系统使用来自结算所的加密密钥创建安全容器,其中安全容器在其中具有来自最终用户系统的加密密钥; 将安全容器转移到结算所,以便认证解密内容的许可。 该系统从结算所接收使用包含解密密钥的最终用户系统的加密密钥加密的安全容器,用于在许可的情况下解密存储在计算机可读介质上的至少部分先前加密的内容; 以及通过使用所述最终用户系统的加密密钥解密所述安全容器来访问所述解密密钥以解密所述加密内容的至少一部分,来播放所述先前加密的内容的至少一部分。