Abstract: A computer implemented authentication method comprising the following steps: determining the spatial position of the user's face using the image obtained by the device's camera; determining a circumference circumscribed around the user's face and displaying it in the user interface; determining the horizontal and vertical lines passing through the center of the circumference characterizing the turn of the user's face; performing at least two rotation user checks comprising the following steps: determining a point on the circumference circumscribed around the user's face and displaying it in the user interface; prompting the user to change the position of the face so the line intersection point is aligned with the set point; obtaining an image of the user's face during the check; determining the correlation between the model generated on the basis of the user's face images during the rotation checks and the previously generated authorized user parameter-based model.