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Enciphering/deciphering apparatus and method incorporating random variable and keystream generation

  • US 6,014,445 A
  • Filed: 10/22/1996
  • Issued: 01/11/2000
  • Est. Priority Date: 10/23/1995
  • Status: Expired due to Term
First Claim
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1. An enciphering apparatus comprising:

  • chaos generation means for generating a real-valued sequence along a chaotic orbit in accordance with a predetermined number of first common keys and a predetermined nonlinear map;

    bit generation means for normalizing individual real values in said real-valued sequence over a predetermined interval and for binarizing said normalized real values using values indicated by a predetermined number of second common keys as thresholds to generate a binary sequence; and

    logic operation means for executing a predetermined logic operation on a binary sequence of an input plaintext and said generated keystream sequence bit by bit to generate a binary sequence of ciphertext.

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