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公开(公告)号：US07328352B2
公开(公告)日：2008-02-05
申请号：US10266323
申请日：2002-10-08
CPC分类号： G06F21/80 , G11B20/00086 , G11B20/0021 , G11B20/00318 , G11B20/00333 , G11B20/00369 , G11B20/00449 , G11B20/00478 , G11B20/00507 , G11B20/00775
摘要： An apparatus for reading or writing user data stored block-wise in encrypted form on a storage medium. The apparatus includes a command interface for receiving and interpreting a read (or write) command. The read command includes a user data information specifying which user data are to be read. A reader reads the user data and a related encryption indicator from a block of the storage medium. The encryption indicator indicates if said user data is encrypted or not. The reader further reads a related key data identifier specifying which key data to use for decrypting the user data if said encryption indicator indicates that said user data are encrypted. A decryptor decrypts the user data using the key data.
摘要翻译： 一种用于读取或写入以加密形式单元存储在存储介质上的用户数据的装置。 该装置包括用于接收和解释读（或写）命令的命令接口。 读取命令包括指定要读取哪个用户数据的用户数据信息。 读取器从存储介质的块读取用户数据和相关加密指示符。 加密指示符指示所述用户数据是否被加密。 如果所述加密指示符指示所述用户数据被加密，则读取器还读取指定用于解密用户数据的密钥数据的相关密钥数据标识符。 解密器使用密钥数据解密用户数据。
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2.发明授权公开(公告)号：US07624285B2
公开(公告)日：2009-11-24
申请号：US10517973
申请日：2003-06-11
IPC分类号： G06F21/00
CPC分类号： G11B20/0021 , G11B20/00086 , G11B20/00369
摘要： A method of protecting user information against manipulations provides a high level of protection against any kind of manipulation without increasing the overhead significantly, by storing the user information in user channel packets of a user channel, assigning state information to the user channel packets, the state information being used to indicate if a user channel packet has been manipulated and/or is unstable or not, and storing the state information assigned to the user channel packets in an additional hidden channel embedded in the user channel, the state information assigned to a user channel packet being stored in the associated hidden channel packet.
摘要翻译： 通过将用户信息存储在用户信道的用户信道分组中，将状态信息分配给用户信道分组，状态，保护用户信息免受操作的方法提供了对任何类型的操纵的高级别保护，而不会显着增加开销 用于指示用户信道分组是否被操纵和/或不稳定的信息，以及将分配给用户信道分组的状态信息存储在嵌入在用户信道中的附加隐藏信道中，分配给用户的状态信息 信道分组被存储在相关联的隐藏信道分组中。
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公开(公告)号：US07570869B2
公开(公告)日：2009-08-04
申请号：US10511971
申请日：2003-04-01
IPC分类号： H04N5/78
CPC分类号： G11B27/329 , G11B27/034 , G11B27/105 , G11B27/28
摘要： The invention relates to a method and an apparatus for defining entry points for a data stream, in particular a stream of audiovisual information. Entry points in the stream are defined at a predetermined interval. This may be a time interval, a byte interval or any other interval. It is an object of the invention to provide an entry point table having a limited size. This object is achieved by increasing the interval between entry points if the table exceeds a predetermined size. This size may be defined in bytes, in the number of entry points or even in the number of sub-tables. After redefinition of the interval between entry points, entry points are redefined. The invention also relates to an apparatus for defining the entry points and to a record carrier with a data stream incorporating entry points defined by the method according to the invention.
摘要翻译： 本发明涉及一种用于定义数据流，特别是视听信息流的入口点的方法和装置。 以预定间隔定义流中的入口点。 这可以是时间间隔，字节间隔或任何其他间隔。 本发明的目的是提供一种具有有限尺寸的入口点表。 如果表超过预定大小，则可以通过增加入口点之间的间隔来实现此目的。 这个大小可以以字节，进入点数量或子表数量来定义。 重新定义入口点之间的间隔后，重新定义入口点。 本发明还涉及一种用于定义入口点的装置和具有包含由根据本发明的方法限定的入口点的数据流的记录载体。
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