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Method and system for performing secure electronic messaging

  • US 6,002,769 A
  • Filed: 09/04/1997
  • Issued: 12/14/1999
  • Est. Priority Date: 06/20/1997
  • Status: Expired due to Term
First Claim
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1. A method for encrypting a message comprising the steps of:

  • a) calculating a numerical value corresponding to each digit of a source key by using said each digit of the source key as an input variable to one of a first plurality of formulae, thereby creating a message key;

    b) selecting said one of the first plurality of formulae in step a) based on a corresponding digit of a random key; and

    c) distributing an alphabet of characters throughout a predetermined matrix for each individual message based on the message key by;

    (i) determining an order fill pattern for the alphabet;

    (ii) determining a start position of an alphabet fill in the matrix from two predetermined digits of the message key;

    (iii) determining a start position of a blank fill from two additional predetermined digits of the message key;

    (iv) determining a blank separation value from two more predetermined digits of the message key;

    (v) determining a blank grouping value from two further predetermined digits of the message key;

    (vi) designating a plurality of blank positions in the matrix starting at a position in the matrix equal to a modular sum of the start position of the alphabet fill plus the start position of the blank fill, continuing for a number of positions in the matrix equal to the blank grouping value, and then skipping a number of positions in the matrix equal to the blank grouping value; and

    (vii) distributing the alphabet in the matrix by starting at the start position of the alphabet fill and filling all positions not designated as blank positions according to the order fill pattern.

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