Lock screen security, and Android device security in general, is a frequent topic of conversation. While lock screens are becoming more functional with features such as the now-standard lock screen widgets, security remains about as easy as ever to work around. This is an issue that may be eased with a new app called NFC Secure Beta.
XDA Senior Member r2DoesInc has released NFC Secure Beta. What the application does is force users to use a NFC tag to unlock the phone. However, it doesn’t replace the current lock screen entirely. As r2DoesInc explains:
NFC Secure is not a lockscreen. It’s a supplement to your current lockscreen. Once you pass your lockscreen and enter the actual device, NFC Secure kicks in. When this happens, you are 100% locked out of the device, no way to get past it, even with a reboot, unless you have your key.
So, along with a good lock screen password, NFC Secure can make it next to impossible for the average Joe to get into your device. This renders tricks like looking at smudges on the screen to discern an unlock pattern useless. Also, if users are worried that they lose their NFC key, the app is capable of supporting multiples, so spares can be made.
This is a lot more information about NFC Secure that can be found in the original thread._________