Signature authentication system
First Claim
1. A system for authenticating a signature upon execution as with a writing instrument having a writing tip, comprising:
- a tablet means defining a surface for supporting a signature during execution, said tablet surface including discontinuities to form impulses when traversed by the forcefully applied tip of said writing instrument;
electrical means for sensing said impulses to provide an electrical signature signal that is frequency related to the velocity of motion in the execution of said signature;
signal-processing means for receiving said frequency related signature signal to provide a characteristic data signal for characterizing said signature; and
means connected to receive said characteristic data signal to manifest an authenticity characteristic indicative of the authenticity of said signature.
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Abstract
A system is disclosed for authenticating a signature on the basis of its execution. Generally, the system senses the speed of the tip of a writing instrument as a criterion for developing an identification or characterization of the signature. As disclosed, a tablet is provided defining a surface which is scored orthogonally to create impulses (by pen contact) that relate to the speed of the tip of a pen. The impulses are sensed as an electrical signal which is processed to derive a characterization of the signature. In one disclosed embodiment, signatures are characterized by the number of impulses developed during a substantial portion of the signing interval. In another disclosed embodiment, signatures are characterized by the time required (in the course of executing a signature) to generate a predetermined number of impulses. In still another embodiment, a system is disclosed to include apparatus for deriving a developed code identification from the signature impulses along with structure for performing a comparison between "test" and "standard" characterizations. Each of the systems as disclosed include means for manifesting authenticity characteristics indicating the likely authenticity of a signature.
25 Citations
10 Claims
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1. A system for authenticating a signature upon execution as with a writing instrument having a writing tip, comprising:
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a tablet means defining a surface for supporting a signature during execution, said tablet surface including discontinuities to form impulses when traversed by the forcefully applied tip of said writing instrument; electrical means for sensing said impulses to provide an electrical signature signal that is frequency related to the velocity of motion in the execution of said signature; signal-processing means for receiving said frequency related signature signal to provide a characteristic data signal for characterizing said signature; and means connected to receive said characteristic data signal to manifest an authenticity characteristic indicative of the authenticity of said signature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification