“While many conventional approaches rely on password entry for user authentication, these passwords can be stolen or discovered by other persons who can impersonate the user for any of a variety of tasks,” Amazon ‘s submission to the US Patent and Trademark Office said.”Further, the entry of these passwords on portable devices is not user friendly in many cases, as the small touchscreen or keyboard elements can be difficult to accurately select using a relatively large human finger, and can require the user to turn away from friends or co-workers when entering a password, which can be awkward or embarrassing in many situations.”The e-commerce firm added that shortcuts for remembering passwords – such as saving them to a device, also made users vulnerable to hackers. - See more at: http://www.lightnepalvideo.com/videos/10-people-who-died-while-taking-selfies-alltimetop/#sthash.37iSypqX.dpuf