Smartphone security: Protecting camera and sensor privacy

Malicious software, including stalkerware and remote access trojans (RAT), can exploit vulnerabilities in Android and iOS to activate smartphone cameras and microphones without user consent. These programs often operate in the background while the screen is off or while other applications are in use, transmitting multimedia files to external command and control servers.

On Android devices, attackers may use technical tricks such as the Camera2 API or abuse accessibility services to bypass security restrictions. To mitigate these risks, users can manage app permissions through system settings. Android allows users to restrict access to the camera, microphone, and location to only when the app is in use, or to deny access entirely. Users can also monitor recent permission usage via the Privacy Dashboard.

Apple devices require applications to request permission before accessing location services. iPhone users can choose to grant access only while using the app or for a single session. Visual indicators, such as icons in the status bar, can help users identify when sensors are actively being used.