Yahoo is working on a way of unlocking a mobile phone using the owner's ear rather than a password or fingerprint.
It is also looking to use fists or even the way people grip their smartphone as alternative forms of biometric authentication. Fingerprint scanners on mobile phones are increasingly popular, but expensive.
Yahoo is looking to use the phone's touchscreen as the image sensor, which would be far cheaper. The system, developed at Yahoo Labs, is dubbed Bodyprint and has had initial trials with 12 participants.
"Due to their cost, capacitive fingerprint scanners have been limited to top-of-the-line phones, a result of the required resolution and quality of the sensor," the team said on its website.http://www.bbc.com/news/technology-32498222