Mobile & IoT Security

Mobile App Permission Management

About 4 min read

What Is Mobile App Permission Management

Mobile app permission management is a system that allows users to grant or deny access when apps installed on a smartphone attempt to use device features and data such as the camera, microphone, location, contacts, and storage.

Both iOS and Android use a "runtime permissions" model, where a dialog asking for permission is displayed at the moment an app tries to use a specific feature. Older Android versions (below 6.0) required bulk approval of all permissions at install time, but now permissions can be individually granted or denied per feature.

Properly managing permissions is directly linked to reducing your digital footprint and protecting privacy. Leaving unnecessary permissions enabled risks apps collecting location data in the background or sending contact data to external servers.

Major Permission Types and Risks

  • Location: The permission with the greatest privacy impact. Setting it to "Always Allow" means location data is collected even when the app is not in use. Necessary for map apps and ride-sharing, but usually unnecessary for news apps or games. iOS allows choosing between "Precise Location" and "Approximate Location."
  • Camera & Microphone: Permissions directly related to the risk of unauthorized recording. Necessary for video calls and QR code readers, but when granted, should be limited to "While Using the App." Since iOS 14, indicators (green and orange dots) are displayed when the camera or microphone is in use.
  • Contacts: Grants access to phone book data. Often requested by social media apps for "Find Friends" features, but there is a risk of contact data being uploaded to servers and shared with third parties.
  • Storage: Access to photos, documents, and downloaded files. Since Android 13, this has been subdivided into "Photos," "Videos," and "Music," allowing permission for only the necessary categories.
  • Notifications: Since iOS 12 and Android 13, notifications also require explicit permission. Allowing unnecessary notifications can become a breeding ground for ads and spam notifications.

Practical Approaches to Permission Management

Following these principles for managing permissions can significantly reduce privacy risks.

  • Principle of least privilege: Only grant permissions necessary for the app's core functionality. A flashlight app requesting camera permission is reasonable, but requesting contacts or location is suspicious.
  • Prefer "While Using": For location and camera, select "While Using the App" instead of "Always Allow." This prevents background data collection.
  • Regular audits: On iOS, go to "Settings → Privacy & Security"; on Android, go to "Settings → Privacy → Permission Manager" to review which apps have access to each permission. Revoke permissions for apps you no longer use.
  • Automatic reset for unused apps: Both iOS and Android have features that automatically reset permissions for apps not used for a certain period. Enabling this is recommended.

App Tracking Transparency (ATT) is an extension of permission management that controls permission for cross-app tracking. Combined with SNS privacy settings, it is important to manage privacy at both the device and app levels.

How to Spot Excessive Permission Requests

Malicious apps or apps with insufficient privacy consideration tend to request permissions disproportionate to their functionality. Watch for these signs.

  • Permissions unrelated to functionality: A calculator app requesting contacts or camera access, or a wallpaper app requesting call history - be cautious when there is no connection between the app's purpose and the permission.
  • App won't work if permission is denied: If an app refuses to launch when an unnecessary permission is denied, collecting data through that permission may be part of its business model.
  • Bulk permission requests on first launch: Trustworthy apps request only the necessary permissions individually at the time each feature is used.

Even when device encryption is enabled, data accessed by apps through user-granted permissions is outside the scope of encryption protection. Permission management is an important security layer that complements device encryption.

To learn more about this topic, see Smartphone Privacy Settings: 8 Often-Overlooked Items.

Common Misconceptions

Apps from official stores are safe to grant all permissions
Malicious apps that slip through Apple App Store and Google Play reviews do exist. Additionally, even legitimate apps may share collected data with advertising networks and third parties. Permissions should be kept to a minimum even for official store apps.
Once granted, permissions cannot be changed
Both iOS and Android allow you to revoke or change permissions at any time from the settings screen. You can also change "Always Allow" to "While Using the App." Make it a habit to regularly review your permission settings.
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