Local Network Protection

Android 17 Adds Local Network Protection and Strengthens Wi-Fi Privacy Controls

Android 17 introduces Local Network Protection, requiring apps to obtain explicit permission before scanning or connecting to devices on the same Wi-Fi network. The feature limits unauthorized discovery of TVs, cameras, printers, consoles and other local equipment that could previously be used to build detailed user profiles. The update also enables Encrypted Client Hello by default to hide domain names during HTTPS handshakes from network observers. Certificate Transparency is now activated by default to detect fraudulent or mis-issued certificates that could enable interception attacks. Additional safeguards block forced downgrades to insecure 2G networks often exploited by fake base stations for SMS-based fraud. These changes collectively reduce passive tracking and man-in-the-middle risks without disrupting legitimate local network functions such as media casting.