KeyLemon

KeyLemon is a program that adds face recognition to the Windows logon, so a PC, tablet or laptop with a webcam can be unlocked just by looking at the camera.  It is able to accomplish this by replacing the traditional password, a set of numbers, symbols and capital letters, with a technology that is able to recognize your face and unlock your device.

A key feature that KeyLemon boasts is the ability to remember your face for your Windows log-ins, which is much faster than having to type a long arduous phrase every time. When several user accounts exist on one PC, KeyLemon recognizes the person in front of the camera and logs into the right account, and the normal password remains available if the webcam fails. The Control Center of version 4 has four sections: Profiles, where a wizard creates your face model, Settings, Webcam and License. A security level slider balances recognition accuracy against ease of use, and optional eye blink and head movement challenges help detect attempts to log in with a photo. According to the program, the biometric data of your personal profile is encrypted and stored on your computer only and is not transferred to KeyLemon or any other parties. KeyLemon was developed by KeyLemon S.A., a company founded in 2008 in Martigny, Switzerland, that specialized in face recognition for authentication.

KeyLemon was offered as a basic free version and paid Bronze and Gold editions with extra features and security options; the last release, version 4.0.3, installs as a 7-day trial. The desktop program is no longer developed, licences are no longer sold and the official website is offline. KeyLemon runs on Windows and needs a built-in or USB webcam; its installer also sets up the Microsoft Visual C++ 2008 Redistributable.

With KeyLemon, you do not have to remember long passwords, because your face is your password.

In summary, KeyLemon uses your face as a password instead of traditional numerics, which makes logging into a personal or shared Windows PC quicker and saves you from typing a password every time.