Pulse or digital communications – Miscellaneous
Reexamination Certificate
2005-09-13
2005-09-13
Corrielus, Jean B (Department: 2637)
Pulse or digital communications
Miscellaneous
C380S247000, C377S064000, C708S252000
Reexamination Certificate
active
06944253
ABSTRACT:
A circuit or software generates a cipher stream. The software models components or the circuit comprises a first and a second plurality of linear feedback shift registers (LFSR). A first of the second plurality of LFSR has a clock signal as a clock input and others of the second plurality of LFSR each have an output of a previous one of the second plurality of LFSR as a clock input. A first of the first plurality of LFSR has the clock signal combined with an output of the first of the second plurality of LFSR as a clock input and others of the first plurality of LFSR each have an output of a previous one of the second plurality of LSFR combined with an output of another of the first plurality of LFSR as a clock input. An output of a last of the first plurality of LFSR and an output of a last of the second plurality of LFSR is combined to produce the cipher stream.
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Corrielus Jean B
InterDigital Technology Corp.
Volpe and Koenig P.C.
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