FaceGuard authenticates identity. Unlike requiring a password, FaceGuard uses the human ability to recognize personally familiar faces in a crowd of strangers. After confirmation, FaceGuard supplies the correct username and passcode for all your websites, apps, and desktop programs. The FaceGuard Android app uses the Accessibility Service API to enable secure credentials insertion on devices. For a detailed overview, watch the video documenting our implementation of accessibility: https://youtu.be/jVAnv-z4QCU