TL;DRAndroid 17 includes stricter lock screen rate limits to make PIN and password guessing much more difficult than before.Devices running Android 17 will allow far fewer incorrect attempts before imposing lengthy lockouts.Google has also implemented a hard cap of 20 failed attempts and introduced duplicate-guess detection and clearer lockout messages for legitimate users.Google first announced stronger lock screen protections for Android 17 during The Android Show: I/O Edition in May. These new protections make it significantly harder for anyone to force their way into your phone by guessing your lock screen PIN or password. Now, Google’s Mishaal Rahman has shared exactly how the new security feature works in Android 17, and the changes are more aggressive than you might expect.Stronger unlock protections in Android 17According to Rahman, Android 17 introduces much stricter default rate limiting for PIN and password attempts on supported devices. Instead of allowing hundreds of guesses over time, the system now sharply reduces the number of incorrect attempts before longer lockouts kick in.