Behaviometric signature authentication system and method
First Claim
1. A method comprising:
- receiving a set of sampled data points, each sampled data point being associated with a different position along a signature;
identifying a subset of nodes within the set of sampled data points using a set of predetermined nodes of a user profile;
identifying, with a processor, nodes of the user profile that correlate with nodes of the subset based on optimization matching;
determining if each identified node of the subset lies within a predetermined threshold range of a corresponding predetermined node;
calculating an acceleration value and a velocity value associated with line segments present between adjacent sampled data points comprised in the set of sampled data points;
defining a geometrical complexity rating of the provided signature on the basis of the calculated acceleration value and the calculated velocity value;
generating a positive verification when the nodes of the subset lie within the predetermined threshold range; and
rejecting the received signature when the defined geometrical complexity rating is below a minimum predetermined required geometrical complexity rating threshold,wherein each sampled data point associated with a visible portion of the signature and each node of the subset is represented by a vector comprising a time coordinate and a spatial component, the spatial component being indicative of a relative position of the vector along the signature.
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Abstract
The present invention discloses a method of verifying the authenticity of a provided signature, comprising the steps of: receiving a set of sampled data points, each sampled data point being associated with a different position along the signature; identifying a set of characterizing nodes within the set of sampled data points using a set of predetermined characterizing nodes comprised in a pre-stored user profile; determining if each identified characterizing node lies within a predetermined threshold range of a corresponding predetermined characterizing node; and generating a positive verification when the characterizing nodes lie within the predetermined threshold range. A system arranged to carry out the method is also disclosed.
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Citations
46 Claims
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1. A method comprising:
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receiving a set of sampled data points, each sampled data point being associated with a different position along a signature; identifying a subset of nodes within the set of sampled data points using a set of predetermined nodes of a user profile; identifying, with a processor, nodes of the user profile that correlate with nodes of the subset based on optimization matching; determining if each identified node of the subset lies within a predetermined threshold range of a corresponding predetermined node; calculating an acceleration value and a velocity value associated with line segments present between adjacent sampled data points comprised in the set of sampled data points; defining a geometrical complexity rating of the provided signature on the basis of the calculated acceleration value and the calculated velocity value; generating a positive verification when the nodes of the subset lie within the predetermined threshold range; and rejecting the received signature when the defined geometrical complexity rating is below a minimum predetermined required geometrical complexity rating threshold, wherein each sampled data point associated with a visible portion of the signature and each node of the subset is represented by a vector comprising a time coordinate and a spatial component, the spatial component being indicative of a relative position of the vector along the signature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system for verifying the authenticity of a provided signature, the system comprising:
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an input device arranged to receive a set of sampled data points, each sampled data point being associated with a different position along the signature; a processor; instructions accessible and executable by the processor, said instructions comprising; identifying a set of characterising nodes within the set of sampled data points using a set of predetermined characterising nodes comprised in a pre-stored user profile;
determining if each identified characterising node lies within a predetermined threshold value range of a corresponding predetermined characterising node;calculating first order and second order derivatives associated with line segments present between adjacent sampled data points comprised in the set of sampled data points; defining a geometrical complexity rating of the provided signature on the basis of the calculated first and second order derivatives; rejecting the received signature when the defined geometrical complexity rating is below a minimum predetermined required geometrical complexity rating threshold; and generating a positive verification result when the characterising nodes lie within the predetermined threshold value range, wherein each sampled data point associated with a visible portion of the signature and each node of the subset is represented by a vector comprising a time coordinate and a spatial component, the spatial component being indicative of a relative position of the vector along the signature. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification