To prevent terminal intrusion through USB debugging mode, follow these security best practices:
Disable USB Debugging When Not in Use
USB debugging is a powerful Android feature that allows direct communication with a device via ADB (Android Debug Bridge). Leaving it enabled exposes the device to unauthorized access if connected to a malicious computer. Always disable it when not actively developing or debugging.
How to disable: Go to Settings > About Phone > Tap "Build Number" 7 times to enable Developer Options. Then, go to Developer Options > USB Debugging and toggle it off.
Use Strong Authentication for ADB Connections
If USB debugging must remain enabled (e.g., for development), ensure only trusted computers can connect. ADB uses RSA keys for authentication—only authorize known devices.
How to manage: On the first ADB connection, a prompt asks to allow USB debugging for the connected computer. Only check "Always allow from this computer" for trusted machines.
Avoid Connecting to Untrusted Computers
Never plug your device into unknown or public PCs via USB, as attackers could exploit USB debugging to install malware or extract data.
Example Risk: A compromised PC could run adb shell commands to access your files or install malicious apps.
Enable Encryption & Screen Lock
Even if USB debugging is exploited, full device encryption and a strong screen lock (PIN, pattern, or biometrics) add layers of protection.
Why it helps: Encrypted data is harder to access, and a screen lock prevents unauthorized physical access.
Monitor Connected Devices
Regularly check which computers are authorized for ADB by running:
adb devices
Revoke access by revoking USB debugging authorizations in Developer Options > Revoke USB Debugging Authorizations.
For Enterprises: Use Mobile Device Management (MDM)
If managing multiple devices, enforce policies to disable USB debugging remotely. Tencent Cloud Mobile Device Management (MDM) solutions help control USB debugging and other security settings across fleets.
By following these steps, you minimize the risk of terminal intrusion via USB debugging while maintaining necessary development functionality.