1. A method of verifying the presence of a living face in front of a camera, the method comprising: capturing by said camera a sequence of images of a face; detecting a plurality of features of said face in each of said images; measuring parameters associated with said detected features to determine whether each of a plurality of liveness indicators is present in said images, wherein determining whether a plurality of liveness indicators is present in said images comprises determining that at least one liveness indicator is present in said images if at least one measured parameter has a variation smaller than a threshold value; and determining whether or not said face is a living face based on the presence in said images of a combination of at least two of said liveness indicators.