Its fingerprint technology, used in mobile phones in Japan for authentication of mobile payments, could help Apple bring those services to markets such as the United States, where mobile-wallet services have been slow to catch on.
Motorola released the Atrix 4G in 2011 which featured a biometric fingerprint sensor it claimed offered a level of security surpassing password or PIN locks. Customers reported mixed levels of success with the scanner, with many saying the sensor failed to recognise their fingerprint. Other digital security systems include the Samsung Galaxy S3's Face Unlock feature, also available on Google's Nexus 4, and in the future it's likely phones will unlock upon recognition of its owner's voice. (Source)