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    • 1. 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。