Patent ID: 6826281
Filing Date: 2004-11-30
Classification: G09C

Abstract:
A method for encrypting and retrieving a data word having a data sequence of data characters using a two dimensional grid of boxes on an encryption sheet and comprising the steps of:(a) selecting a master word having a known master sequence of master characters; (b) recording said master word on said encryption sheet in a scrambled sequence of said master characters other than said master sequence along a master line of said boxes of said grid; (c) recording said data word along a data line of boxes of said grid in said scrambled sequence by a fixed geometric offset of each of said data characters to at least one of said master characters; (d) retrieving said data word by finding said master characters in said scrambled sequence and locating said data characters by reference to said fixed geometric offset of said data characters respectively to said master characters in said scrambled sequence; (e) providing said grid of boxes on both of opposite sides of said encryption sheet; (f) recording said scrambled sequence on said encryption sheet by alternating from master character to master character onto opposite sides of said encryption sheet; and (g) recording said data word in said scrambled sequence as alternated on said opposite sides of said encryption sheet.