Digital signature collection and authentication
First Claim
1. A method of operating a digital signature collection system comprising:
- during creation of a signature, receiving ultrasonic energy from an ultrasonic transmitter of an implement at a plurality of ultrasonic receivers;
during creation of the signature, receiving pressure information at a higher frequency receiver, wherein the pressure information is based on digital output from an analog-to-digital (A/D) convertor, the digital output is based on an analog signal from a pressure sensor, the analog signal has an amplitude that is proportional to the amount of pressure applied by a tip of the implement, and the pressure information describes different amounts of pressure applied by the tip of the implement at different times during creation of the signature;
determining a plurality of locations of the ultrasonic transmitter versus time, from the ultrasonic energy to determine a signature shape;
determining a plurality of pressure measurements versus time, from the pressure information, wherein the pressure measurements describe at least first and second amounts of pressure, the first amount corresponds to at least enough pressure to denote contact between the tip of the implement and a surface, and the second amount corresponds to a greater amount of pressure than the first amount; and
creating a digital representation of the signature, based on the determined locations and pressure measurements, wherein the digital representation comprises;
shape data pertaining to the plurality of locations of the ultrasonic transmitter; and
pressure data pertaining to the plurality of pressure measurements, wherein the pressure data describes the at least first and second amounts of pressure.
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Accused Products
Abstract
A digital signature collection and authentication system includes an ink pen having an ultrasonic transmitter that transmits ultrasonic energy to a plurality of ultrasonic receivers. A computer triangulates the location of the pen versus time to generate the signature shape, and to generate velocity and acceleration data. The pen also includes a pressure sensitive tip to record pressure applied to the pen tip. The pen also includes a higher frequency burst transmitter useful to generate a time reference, and to transmit the pressure information. The computer packetizes the shape, velocity, acceleration, and pressure data with a time stamp and an IP address or phone number, encrypts the packet and sends it to a host computer for authentication.
41 Citations
20 Claims
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1. A method of operating a digital signature collection system comprising:
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during creation of a signature, receiving ultrasonic energy from an ultrasonic transmitter of an implement at a plurality of ultrasonic receivers; during creation of the signature, receiving pressure information at a higher frequency receiver, wherein the pressure information is based on digital output from an analog-to-digital (A/D) convertor, the digital output is based on an analog signal from a pressure sensor, the analog signal has an amplitude that is proportional to the amount of pressure applied by a tip of the implement, and the pressure information describes different amounts of pressure applied by the tip of the implement at different times during creation of the signature; determining a plurality of locations of the ultrasonic transmitter versus time, from the ultrasonic energy to determine a signature shape; determining a plurality of pressure measurements versus time, from the pressure information, wherein the pressure measurements describe at least first and second amounts of pressure, the first amount corresponds to at least enough pressure to denote contact between the tip of the implement and a surface, and the second amount corresponds to a greater amount of pressure than the first amount; and creating a digital representation of the signature, based on the determined locations and pressure measurements, wherein the digital representation comprises; shape data pertaining to the plurality of locations of the ultrasonic transmitter; and pressure data pertaining to the plurality of pressure measurements, wherein the pressure data describes the at least first and second amounts of pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operating a digital signature collection system comprising:
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receiving ultrasonic energy from an ultrasonic transmitter of an implement at a plurality of ultrasonic receivers, wherein the ultrasonic energy pertains to a signature created with the implement; receiving pressure information pertaining to the signature at a higher frequency receiver, wherein the pressure information comprises a characteristic that varies to describe different amounts of pressure applied by the implement at different times during creation of the signature; determining a plurality of locations of the ultrasonic transmitter versus time, from the ultrasonic energy to determine a signature shape; determining a plurality of pressure measurements versus time, from the pressure information, wherein the pressure measurements describe at least first and second amounts of pressure, the first amount denotes at least enough pressure to denote contact between the implement and a surface, and the second amount denotes a greater amount of pressure than the first amount; and creating a digital representation of the signature, based on the determined locations and pressure measurements. - View Dependent Claims (12, 13, 14, 15, 16)
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17. At least one machine-readable medium comprising a plurality of instructions that in response to being executed on a computing device, cause the computing device to perform operations comprising:
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receiving ultrasonic energy from an ultrasonic transmitter of an implement at a plurality of ultrasonic receivers, wherein the ultrasonic energy pertains to a signature created with the implement; receiving pressure information pertaining to the signature at a higher frequency receiver, wherein the pressure information comprises a characteristic that varies to describe different amounts of pressure applied by the implement at different times during creation of the signature; determining a plurality of locations of the ultrasonic transmitter versus time, from the ultrasonic energy to determine a signature shape; determining a plurality of pressure measurements versus time, from the pressure information, wherein the pressure measurements describe at least first and second amounts of pressure, the first amount denotes at least enough pressure to denote contact between the implement and a surface, and the second amount denotes a greater amount of pressure than the first amount; and creating a digital representation of the signature, based on the determined locations and pressure measurements. - View Dependent Claims (18, 19, 20)
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Specification