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    • 74. 发明授权
    • Copy protection method and system for digital media
    • 数字媒体复制保护方法和系统
    • US07877813B2
    • 2011-01-25
    • US11878647
    • 2007-07-26
    • Hyung Sun KimAlexandre StechkineByung Jin KimSoung Hyun Um
    • Hyung Sun KimAlexandre StechkineByung Jin KimSoung Hyun Um
    • H04N7/16
    • G06F21/6209G06F21/10G06F2221/2107H04L9/0822H04L9/0825H04L9/0891H04L9/3263H04L2209/605
    • A copy protection method and a copy protection system are disclosed. The system includes a private key verifier receiving a media certificate that includes a private key identification of a compliant playing device and searching for an actual private key corresponding to the private key identification, an intermediate key decryptor receiving an encrypted intermediate key and decrypting the intermediate key with the actual private key, a media key decryptor obtaining an original media key by decrypting the decrypted intermediate key with a media identification; and a media data decryptor receiving an encrypted media data set and decrypting the media data set with the original media key. The method and system of the present invention are applicable to all types of digital media data, and it makes no assumption of any specific media properties. The primary goal of the present invention is to significantly reduce the possibility of making any illegal copies on any nonstandard equipment and is to restrict the media data transfers only to authorized entities.
    • 公开了一种复制保护方法和复制保护系统。 该系统包括接收媒体证书的私钥验证器,该媒体证书包括兼容播放设备的私钥标识,并搜索对应于该私钥标识的实际私钥;中间密钥解密器,接收加密的中间密钥并解密该中间密钥 利用实际的私钥,媒体密钥解密器通过用媒体识别解密解密的中间密钥来获得原始媒体密钥; 以及媒体数据解密器,接收加密的媒体数据集并用原始媒体密钥解密媒体数据集。 本发明的方法和系统可应用于所有类型的数字媒体数据,并且不考虑任何特定的媒体属性。 本发明的主要目标是显着地减少在任何非标准设备上进行任何非法复制的可能性,并且将媒体数据传输限制到授权实体。
    • 75. 发明授权
    • Copy protection method and system for digital media
    • 数字媒体复制保护方法和系统
    • US07254838B2
    • 2007-08-07
    • US10135840
    • 2002-05-01
    • Hyung Sun KimAlexandre StechkineByung Jin KimSoung Hyun Um
    • Hyung Sun KimAlexandre StechkineByung Jin KimSoung Hyun Um
    • H04L9/32H04N7/167H04L9/00G06F12/14
    • G06F21/6209G06F21/10G06F2221/2107H04L9/0822H04L9/0825H04L9/0891H04L9/3263H04L2209/605
    • A copy protection method and a copy protection system are disclosed. The system includes a private key verifier receiving a media certificate that includes a private key identification of a compliant playing device and searching for an actual private key corresponding to the private key identification, an intermediate key decryptor receiving an encrypted intermediate key and decrypting the intermediate key with the actual private key, a media key decryptor obtaining an original media key by decrypting the decrypted intermediate key with a media identification; and a media data decryptor receiving an encrypted media data set and decrypting the media data set with the original media key. The method and system of the present invention are applicable to all types of digital media data, and it makes no assumption of any specific media properties. The primary goal of the present invention is to significantly reduce the possibility of making any illegal copies on any nonstandard equipment and is to restrict the media data transfers only to authorized entities.
    • 公开了一种复制保护方法和复制保护系统。 该系统包括接收媒体证书的私钥验证器,该媒体证书包括兼容播放设备的私钥标识,并搜索对应于该私钥标识的实际私钥;中间密钥解密器,接收加密的中间密钥并解密该中间密钥 利用实际的私钥,媒体密钥解密器通过用媒体识别解密解密的中间密钥来获得原始媒体密钥; 以及媒体数据解密器,接收加密的媒体数据集并用原始媒体密钥解密媒体数据集。 本发明的方法和系统可应用于所有类型的数字媒体数据,并且不考虑任何特定的媒体属性。 本发明的主要目标是显着地减少在任何非标准设备上进行任何非法复制的可能性,并且将媒体数据传输限制到授权实体。