A validation phase is performed at an RFID reader, in order to ascertain which of a plurality of potential candidates for authentication, are actual candidates for authentication. Preferably, a method for encoding data corresponding to connectivity information of a 3D finite element mesh, with the mesh being formed of tetrahedra, includes the steps of: providing data corresponding to connectivity information of the 3D finite element mesh, and; reconfiguring the data based upon identification of faces of each of the tetrahedra where other tetrahedra are to be attached. The first layer and the second layer are laminated to form the laminated film.