Unlocking electronic devices using touchscreen input gestures

A system for detecting input gesture events on a touchscreen of a smartphone and for unlocking the smartphone, the system comprising:

• a memory;
• and
• a processor in communication with the memory, the processor configured to obtain instructions from the memory that cause the processor to perform a method comprising:
• displaying, while the smartphone is in a locked state, a plurality of guidance lines on the touchscreen of the smartphone, the plurality of guidance lines displayed in a plurality of colors;
• detecting, during an input gesture event, guidance line crossings, the guidance line crossings including a transition of the input gesture event from a first side of a guidance line to a second side of the guidance line;
• calculating a number of guidance line crossings detected during the input gesture event;
• converting the number of guidance line crossings into at least one password digit, the converting including multiplying the number of guidance line crossings by a numerical weighting value of 2;
• comparing a sequence of password digits including the at least one password digit to a password stored in the smartphone;
• and
• unlocking, in response to comparing the sequence of password digits to the stored password, the smartphone.