Sensor-based transaction authorization via user device

A system of movement-based input, the system comprising:

• at least one memory;
• and
• at least one processor, wherein the at least one processor is configured to:
• identify, based on sensor data from at least one sensor, a plurality of points along a movement arc in a three-dimensional space;
• generate a curve in the three-dimensional space, wherein the curve runs along the plurality of points;
• project the curve onto a plane from a perspective to generate a two-dimensional representation of the curve, wherein the plane is oriented based on a direction in which the curve progresses;
• and
• transmit information corresponding to the two-dimensional representation of the curve to a payment service system to cause the payment service system to progress a transaction based on the information.

A non-transitory computer readable storage medium having embodied thereon a program, wherein the program is executable by a processor to perform a method of movement-based input, the method comprising:

• identifying, based on sensor data from at least one sensor, a plurality of points along a movement arc in a three-dimensional space;
• generating a curve in the three-dimensional space, wherein the curve runs along the plurality of points;
• projecting the curve onto a plane from a perspective to generate a two-dimensional representation of the curve, wherein the plane is oriented based on a direction in which the curve progresses;
• and
• transmitting information corresponding to the two-dimensional representation of the curve to a payment service system to cause the payment service system to progress a transaction based on the information.