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    • 61. 发明授权
    • Cryptosystem-related method and apparatus
    • 密码系统相关方法和装置
    • US06891951B2
    • 2005-05-10
    • US09733057
    • 2000-12-11
    • Wataru InohaTakayuki SugaharaToshio KuroiwaKenjiro UedaSeiji Higurashi
    • Wataru InohaTakayuki SugaharaToshio KuroiwaKenjiro UedaSeiji Higurashi
    • H01S3/034H01S3/036H01S3/038H01S3/07H01S3/08H01S3/086H04L9/06H04L9/08H04L9/32H04L9/14
    • H04L9/0618H04L2209/30H04L2209/603
    • Bits of a first bit sequence are rearranged in a first matrix according to a predetermined arrangement rule. The first bit sequence represents information being a base of a key. Blocks are formed in the first matrix. Each of the blocks has bits, the number of which is smaller than the number of bits composing the first matrix. Logical operation is executed among bits in each of the blocks, and a bit being a result of the logical operation is generated. The logical-operation-result bits are combined into a second bit sequence. The number of bits composing the second bit sequence is smaller than the number of bits composing the first bit sequence. There is a second matrix composed of predetermined third bit sequences. The second matrix is accessed and one is read out from among the third bit sequences in response to the second bit sequence. The read-out third bit sequence is outputted as information representative of the key. The number of bits composing each of the third bit sequences is smaller than the number of bits composing the second bit sequence.
    • 根据预定的布置规则,第一比特序列的比特重新排列在第一矩阵中。 第一位序列表示作为键的基础的信息。 块形成在第一矩阵中。 每个块具有位数,其数量小于构成第一矩阵的位数。 在每个块中的位之间执行逻辑运算,并且生成作为逻辑运算结果的位。 逻辑运算结果位被组合成第二位序列。 构成第二比特序列的比特数小于构成第一比特序列的比特数。 存在由预定的第三比特序列组成的第二矩阵。 第二矩阵被访问,并且响应于第二比特序列从第三比特序列中读出一个。 作为代表键的信息输出读出的第3位序列。 构成每个第三比特序列的比特数小于构成第二比特序列的比特数。
    • 70. 发明授权
    • Method and devices for copy protection, copy protected record carrier
    • 复制保护方法和设备,复制受保护的记录载体
    • US08374064B2
    • 2013-02-12
    • US13371953
    • 2012-02-13
    • Kenjiro UedaKlaus HolzapfelAndreas WinterMarkus Spitzlinger
    • Kenjiro UedaKlaus HolzapfelAndreas WinterMarkus Spitzlinger
    • G11B21/08
    • G11B20/00086G11B20/0063G11B20/00688G11B20/00927G11B2220/2541G11B2220/2562
    • A method for copy protection includes providing audiovisual or audio data stored in sectors of a record carrier having a file system, and providing additional data to be stored in further sectors. The method includes generating first and second files referencing respective first and second parts of the sectors and respective further first and second parts of the further sectors, so when the first and second files are completely rendered by a playback device, respective first and second parts of the data and respective further first and second parts of the additional data are reproduced. The method also includes determining program instructions, which when executed by the playback device, control switching between reading the first file and the second file, and when the record carrier is an original, switching is controlled so only the sectors and none of the further sectors are read such that no additional data is reproduced.
    • 一种用于复制保护的方法包括提供存储在具有文件系统的记录载体的扇区中的视听或音频数据,并提供要存储在其他扇区中的附加数据。 该方法包括产生参考扇区的相应第一和第二部分的第一和第二文件以及另外扇区的相应另外的第一和第二部分,因此当第一和第二文件被回放设备完全呈现时,相应的第一和第二部分 附加数据的数据和相应的另外的第一和第二部分被再现。 该方法还包括确定程序指令,当程序指令由播放装置执行时,控制在读取第一文件和第二文件之间的切换,以及当记录载体为原始时,切换被控制为只有这些扇区,而不是其它扇区 被读取,使得没有再现数据。