Apple's authentication and screen activation technology called as Touch ID is now under dispute as the South Korean mobile technology solutions firm Firstface is filing a lawsuit against Apple for allegedly copying its patented technology. Apple introduced the Touch ID feature in its iPhone 5S way back in 2013 and is inheriting this feature in its succeeding phones. The Touch ID feature is a 1-step unlocking of the phone via the biometric sensor-based user authentication. Prior to this, Apple used 2-way authentication where the user needs to press a button to unlock the phone and then place his finger on the home button to authenticate and unlock.