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Secure data input dialogue using visual cryptography

  • US 20050044395A1
  • Filed: 12/13/2002
  • Published: 02/24/2005
  • Est. Priority Date: 01/17/2002
  • Status: Abandoned Application
First Claim
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1. A method of secure reception of a message from a user, comprising generating (401) an image (320) representing a plurality of input means (321) each representing an input symbol that can be used in the message, encoding (402) the image by, for each pixel in the image (320), choosing (423, 427) a first pattern (P0) if the pixel is of a first color and a portion of a key sequence represents a first value, or if the pixel is of a second color and the portion represents a second value, and choosing (424, 426) a second pattern (P1) if the pixel is of the second color and the portion represents the first value, or if the pixel is of the first color and the portion represents the second value, transmitting (403) for each pixel the pertinent chosen pattern to a device operable by the user, receiving (404) a set of coordinates from the device, translating (405) the set of coordinates to a particular input means represented on the image (320), and constructing (406) the message from the user as the input symbol represented by the particular input means.

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