Smartphones have already got some capability to protect your personal data from other people. You can use PIN codes, passwords, fingertips, voice recognition technology, and other features to make it impossible for someone else to use your phone without your permission.
It would be great if your phone could recognize a number of your personal characteristics to authorize you as its owner. Along with voice recognition and fingertips scanning technologies that some gadgets are using already, smartphones may analyze your face, or pattern of typing, or even your walk. So, we hope that in several years, it will be impossible for anyone to get access to your personal data using your mobile phone.