# Biometric Score

The biometric score is the best way to authenticate existing customers in your database to transition to or access new features in your application/platform.

A verification is performed to ensure that the customer is performing a given action **is the same** who went through the registration process using the *Authentication Score*.

Thus, quickly, with little friction and with the possibility of reaching a false positive rate of 0.0001% using Liveness, it is returned to your application whether the submitted face is the registered face corresponding to the same person.

### Operation of the score flow <a href="#funcionamento-do-fluxo-do-score" id="funcionamento-do-fluxo-do-score"></a>

The biometric score validates the submitted face image with another already stored in the database

The Biometric Score flow is divided into 3 steps:

1. **Submission of the captured image and the Authentication Score ID**

   The application sends the captured image and the Authentication Score ID, where:

   * The submitted image is the same selfie the user takes at the time of authentication.
   * The Authentication Score used is the same obtained when the initial registration was completed.
2. **Consistency Checks**

   Analysis of photo quality and validity of the authentication score ID

   * Quality of the submitted photo: If the photo is not within the standards recommended by FaceSign, an error message is returned. For more information about the recommended standards, see the section [Capture Standard](http://doc.facesign.in:25257/docs/Recursos/Padr%C3%A3o%20de%20captura).
   * Validity of the Authentication Score ID: The ID format is checked, validating whether it follows the valid standard.
3. **Comparison result**

   Comparison of the submitted image with an image already existing in your database. This comparison returns one of the following responses to your application:

   * True: the compared images correspond to the same person. That is, the person performing the transaction is the registered person.
   * False: the compared images do not correspond to the same person. That is, the person performing the transaction is not the registered person.

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### Support and Contact

For technical support or questions, use the FaceSign Admin Portal or contact our team through the official channels.