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热词
    • 8. 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。