会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 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。
    • 10. 发明授权
    • Copyright protection system for data storage and transmission
    • 版权保护系统,用于数据存储和传输
    • US07239703B2
    • 2007-07-03
    • US10917489
    • 2004-08-13
    • Seiji HigurashiTakayuki Sugahara
    • Seiji HigurashiTakayuki Sugahara
    • H04N7/167
    • H04L12/40104H04L12/40117H04N5/913H04N9/8042H04N2005/91328H04N2005/91335H04N2005/91364
    • The invention provides a recording media player and a recording media recorder provided with a high-security copy protection system of less complexity. A recording media player and/or recorder provided with a copy protection system stubborn to attacks and highly flexible in dealing with recording media of various copy conditions. For this purpose, various distributed copyright protection information (DCPI) values are used. The DCPI values include water marks in case of an MPEG stream, Copy Generation Management System (CGMS) codes, EMI (encryption mode indicator) in case of an IEEE1394-1995 interface, and user defined DCPI values. The recording is achieved such that DCPI values are recorded in user-unrewritable (or user-inaccessible) areas of the recording medium as long as possible.
    • 本发明提供一种具有较低复杂度的高安全性复制保护系统的记录媒体播放器和记录媒体记录器。 一种记录媒体播放器和/或记录器,该记录媒体播放器和/或记录器具有顽固的攻击和高灵活性的复制保护系统,以处理各种复制条件的记录介质。 为此,使用各种分布式版权保护信息(DCPI)值。 DCPI值包括在MPEG流的情况下的水印,在IEEE1394-1995接口的情况下的复制生成管理系统(CGMS)代码,EMI(加密模式指示符))和用户定义的DCPI值。 实现记录,使得DCPI值尽可能长地记录在记录介质的用户不可重写(或用户不可访问的)区域中。