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    • 5. 发明授权
    • Recording medium, method and apparatus for recording/reproducing information which has been scrambled using a medium identifier and a sector number
    • 用于记录/再现已经使用介质标识符和扇区号加扰的信息的记录介质,方法和装置
    • US06526010B1
    • 2003-02-25
    • US09686967
    • 2000-10-12
    • Koichi MoriokaTakashi YumibaTeruyuki Takizawa
    • Koichi MoriokaTakashi YumibaTeruyuki Takizawa
    • G11B509
    • G11B20/1217G06F21/10G06F21/80G11B20/00086G11B20/0021
    • An information recording medium includes a plurality of sectors each of which has a sector header area storing a unique sector number and a data storage area for storing user data. User data to be recorded onto the information recording medium is scrambled using a data scramble key generated from a unique medium identifier of the information recording medium and a sector number of a sector into which the user data is to be recorded. The medium identifier used here has been scrambled using a medium identifier scramble key generated from predetermined data and a sector number of a sector into which the medium identifier is to be stored, and stored in that sector. In so doing, security is ensured not only for each individual information recording medium but also for each individual sector, with it being possible to protect data recorded on the information recording medium against unauthorized reproduction.
    • 信息记录介质包括多个扇区,每个扇区具有存储唯一扇区号的扇区标题区域和用于存储用户数据的数据存储区域。 要记录在信息记录介质上的用户数据使用从信息记录介质的唯一介质标识符产生的数据加密密钥和用户数据要被记录到的扇区的扇区号进行加扰。 这里使用的介质标识符已经使用从预定数据生成的介质标识符加密密钥和要存储介质标识符的扇区的扇区号进行加扰,并存储在该扇区中。 在这样做时,不仅对于每个单独的信息记录介质,而且对于每个单独的扇区,都可以确保安全性,从而可以保护记录在信息记录介质上的数据免受未经授权的再现。