A wearable sensor is a device designed to be worn on the body and measure physical data such as motion, heart rate, temperature, location, or pressure. In cyber security, wearable sensors matter because they collect highly sensitive personal data and often communicate over Bluetooth, Wi-Fi, or mobile apps. That creates a larger attack surface than a simple offline gadget.
Attackers may try to intercept sensor traffic, spoof readings, pair with a device without permission, or exploit weak firmware and companion apps. Defenders protect wearables with strong authentication, encrypted communications, secure updates, and careful permission handling. In real environments, wearable sensors are used in fitness bands, medical devices, industrial safety gear, and identity systems, where the security of the data is as important as the accuracy of the measurement.