Android permissions are the access requests an app makes to use protected phone features such as the camera, microphone, contacts, SMS, location, Bluetooth, NFC, and foreground services. Some permissions are granted at install time, while others must be approved at runtime, especially for sensitive data and device controls.
They matter in cyber security because permissions define what a malicious app can do after it is installed. Attackers often abuse overbroad or misleading permission requests to read messages, intercept notifications, capture screen content, control the interface, or interact with payment-related functions. In mobile fraud and spyware campaigns, permission abuse can turn a normal phone into a surveillance tool or a relay point for transactions. Defenders reduce risk by checking whether an app truly needs each permission, avoiding sideloaded apps, reviewing dangerous grants, and revoking access that is not essential. Least privilege is the key principle: the fewer permissions an app has, the smaller the attack surface if it is compromised.