Passwords was the only option to authenticate human beings to get right of entry to their gadgets. In latest years, increasingly more devices provide biometric sensors together with fingerprints or drawing on display as alternative authentication options to release the gadgets, but still require passwords because the ultimate assist aid in case that biometric answers fail to work with repeated attempts. Despite the fact that, those new alternatives cannot avoid the usability problem. A device nevertheless calls for its user to again and again enter their passwords or pins, contact the display with drawing, or vicinity a finger on the fingerprint sensor. Therefore, a way to limit the usability problem of inconvenience is large, critical but hard. On this thesis work, we suggest a non-password software-handiest solution that’s a passive and non-stop authentication. It does not depend upon the conventional authentication inputs together with password or biometric records, but on consumer’s ancient behaviors in the use of a device.