发明名称 Method and apparatus for encryption having a feedback register with selectabletaps
摘要 A method and apparatus for generating a pseudo-random bit sequence is provided. A first input bit is determined as a function of bits stored in a shift register in accordance with a first feedback algorithm. In addition, a second input bit is determined as a function of bits stored in the shift register in accordance with a second feedback algorithm. Subsequently, a particular input bit to be provided to the shift register is deterministically selected from the group consisting of the first input bit and the second input bit such that a non-linear pseudo random sequence may be produced by the shift register. In addition, a communication unit which utilizes the pseudo-random bit sequence in encrypting a signal to be transmitted and decrypting a received signal is described.
申请公布号 GB9507790(D0) 申请公布日期 1995.06.14
申请号 GB19950007790 申请日期 1994.07.11
申请人 MOTOROLA INC 发明人
分类号 H04J11/00;H04K1/06;H04L9/00;H04L9/22;H03K3/84;G09C1/00;G06F7/58;H04L9/26;H04Q7/38 主分类号 H04J11/00
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