发明名称 |
METHOD AND APPARATUS FOR ENCRYPTION HAVING A FEEDBACK REGISTER WITH SELECTABLE TAPS. |
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 |
EP0672273(A4) |
申请公布日期 |
1997.05.28 |
申请号 |
EP19940923426 |
申请日期 |
1994.07.11 |
申请人 |
MOTOROLA INC. |
发明人 |
PUHL, LARRY, C.;FINKELSTEIN, LOUIS, DAVID |
分类号 |
G06F7/58;G09C1/00;H03K3/84;H04J11/00;H04K1/06;H04L9/00;H04L9/22;H04L9/26;H04Q7/38;(IPC1-7):G06F1/02 |
主分类号 |
G06F7/58 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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