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    • 17. 发明申请
    • Data Storing Method, Data Playback Method, Data Recording Device, Data Playback Device, and Recording Medium
    • 数据存储方法,数据回放方法,数据记录装置,数据回放装置和记录介质
    • US20090013195A1
    • 2009-01-08
    • US11813740
    • 2006-01-18
    • Makoto OchiKazuya FujimuraShinji Inoue
    • Makoto OchiKazuya FujimuraShinji Inoue
    • H04L9/06
    • G11B20/00181G06F21/10G06F21/78G11B20/00086G11B20/00253G11B20/00492G11B2220/61H04L9/0894H04L2209/60H04N5/913H04N7/163H04N21/4334H04N21/4408H04N21/4627H04N21/8352H04N21/8355H04N2005/91364
    • Provided is a method for performing high-speed search for a content key associated with encrypted content in the case of a key-separation-type content management method where content keys and their respective pieces of encrypted content are correlated by ID information and stored in different recording media. An external recording medium is used to store a plurality of content files that contain: their respective pieces of encrypted content that are encrypted with different encryption keys; and their respective content IDs, each being associated with a corresponding piece of the encryption content, and a semiconductor recording medium is used to store a list that contains: pieces of encryption key storage location information, each indicating where a corresponding one of the encryption keys is stored; and the content IDs, the list being sorted in accordance with the content IDs. When encrypted content is played back, the list is searched to find encryption key storage location information associated with a content ID that matches the content ID of the encrypted content, and the encryption key is read based on the encryption key storage location information.
    • 提供了一种用于在密钥分离型内容管理方法的情况下执行与加密内容相关联的内容密钥的高速搜索的方法,其中内容密钥及其各自的加密内容通过ID信息相关并存储在不同的密钥分离型内容管理方法中 录音媒体 外部记录介质用于存储多个内容文件,其中包含:使用不同加密密钥加密的其各自的加密内容; 以及它们各自的内容ID,每个内容ID与相应的一部分加密内容相关联,并且半导体记录介质用于存储列表,该列表包含:加密密钥存储位置信息,每个加密密钥存储位置信息指示相应的一个加密密钥 被存储 和内容ID,该列表根据内容ID进行排序。 当回放加密内容时,搜索列表以找到与与加密内容的内容ID匹配的内容ID相关联的加密密钥存储位置信息,并且基于加密密钥存储位置信息来读取加密密钥。