Method for authenticating a three-dimensional signature

Abstract

An authentication method involves comparing a 2D description of an authentication device, referred to as a subsequent description, with an original 2D description by choosing, from several previously established original 2D descriptions, a 2D description established from a point of view similar to the one used to establish the subsequent 2D description. Advantageously, the optical characteristics of the authentication device vary so little when it is viewed from neighboring points of view that the device can be recognized from most of the points of view, and the original 2D descriptions have been established from neighboring points of view, which form a substantially continuous domain. In an improved version, a three-dimensional description of the authentication device, referred to as a 3D description, is reconstructed from several original 2D descriptions, which makes it possible to predict the appearance thereof from a plurality of different points of view.

Dependencies are inferred from the claim text.