Passive and Active Liveness
Describing how passive and active liveness works.
The objective of the Liveness check is to verify the authenticity and physical presence of an individual in front of the camera. In the passive Liveness check, it is sufficient to capture a user's face while they look into the camera. Conversely, the active Liveness check requires the user to perform an action such as smiling, blinking, or turning their head. While passive Liveness is more user-friendly, active Liveness may be necessary in some situations to confirm that the user is aware of undergoing the Liveness check.
In our Mobile or Web SDKs, you can define what action the user is required to do. You can also combine several actions into a sequence. Actions vary in the following dimensions:
- User experience,
- File size,
- Liveness check accuracy,
- Suitability for review by a human operator or in court.
In most cases, the Selfie action is optimal, but you can choose other actions based on your specific needs. Here is a summary of available actions:
To recognize the actions from either passive or active Liveness, our algorithms refer to the corresponding tags. These tags indicate the type of action that a user is performing within a media. For more information, please read the Media Tags article. The detailed information on how the actions, or, in other words, gestures are called in different Oz Liveness components is here.