AUTHENTICATION METHOD OF FIELD CONTENTS BASED CHALLENGE AND ENUMERATED PATTERN OF FIELD POSITIONS BASED RESPONSE IN RANDOM PARTIAL DIGITIZED PATH RECOGNITION SYSTEM

摘要

An interactive method for authentication is based on a shared secret which is in the form of an enumerated pattern of fields on a frame of reference. An instance of the frame of reference comprises an array of characters in which the characters are arranged in a random or other irregular pattern on a grid of content fields. An authentication challenge includes characters from the character set, and is delivered in- or out-of-band. The authentication response includes the enumerated position numbers on the enumerated pattern of the field locations on the grid at which the challenge characters are found.