A flex sensor is an electronic component that changes its resistance when bent. It is made of a flexible substrate with conductive material, allowing it to detect the degree of bending or flexing. Flex sensors are widely used in wearable technology, robotics, and gaming controllers to measure movement, gesture, or position. In cybersecurity, flex sensors can be part of authentication systems, such as gesture-based access controls, where user movement patterns help verify identity. Their integration enhances security by adding an extra layer of biometric or behavioral data, making unauthorized access more difficult.