Reivindicaciones

1. Process for marking, encryption, labelling and non-destructive optical encoding characterized in that it comprises the deposition on a substrate (400), of at least one fluorescent polymer layer (300) with a thickness between tens and several hundreds of nanometers through plasma polymerization (100) of dye molecules and through marking motifs (301). 2. Process according to claim 1, characterized in that the marking of motifs (301) is performed by a laser (101), using an ablation process by moving the focal point. 3. Process according to claim 1, characterized in that the marking of motifs (301) is performed by a laser (101), using an ablation process by direct projection through a conventional mask (202). 4. Process according to claim 1, characterized in that the marking of motifs (301) is performed by a laser (101), using an ablation process through a diffractive mask (203). 5. Process according to claim 1, characterized in that the marking of motifs (301) is performed using a laser (101) in inner areas of the layer (300) by focus adjustment and control of the focal point which moves defining the shape of the marked motif (301) inside said layer (300). 6. Process according to claim 1, characterized in that the marking of motifs (301) is performed using a mask (202) during the growth process of the layer (300). 7. Process according to claim 1, characterized in that the marking of motifs (301) is performed by selective abrasion of the formed layer (300) using a mask (202). 8. Process according to claim 1, characterized in that the marking of motifs (301) is performed by illumination with ultraviolet light through a mask (202). 9. Process according to any of claims 2-4, characterized in that the marking of motifs (301) is performed in different layers (300), and therefore may contain superimposed coded information. 10. Process according to any of claims 1-8, characterized in that the fluorescent polymer layer (300) absorbs in the ultraviolet (UV) area and emits in the visible and / or infrared (IR) area. 11. Process according to any of claims 1-8, characterized in that the fluorescent polymer layer (300) absorbs in the visible and emits fluorescence in the visible and / or infrared (IR). 12. Process according to claim 10, characterized in that the motifs (301) engraved in the fluorescent polymer layers (300) that absorb in the ultraviolet (UV) area and emit in the visible can be seen in the visible range and / or Infrared (IR) by illuminating the layer with ultraviolet light. 13. Process according to claim 11, characterized in that in the fluorescent polymer layers (300) that absorb in the visible area, the coloured layer may re-emit light in another wavelength different from the one of excitation. 14. Process according to any of claims 1-13, characterized in that the substrate (400) is a sensitive substrate (400). 15. Process according to claim 14, characterized in that the substrate (400) is paper. 16. Process according to claim 14, characterized in that the substrate (400) is plastic. 17. Process according to any of claims 1-13, characterized in that the substrate (400) is a stable and robust substrate (400). 18. Process according to claim 17, characterized in that the substrate (400) is ceramic. 19. Process according to claim 17, characterized in that the substrate (400) is glass. 20. Process according to claim 17, characterized in that the substrate (400) is metal. 21. Process according to any of the preceding claims, characterized in that the shape of the substrate surface (400) is flat. 22. Process according to any of claims 1-21, characterized in that the shape of the surface of the substrate (400) is round. 23. Process according to any of the preceding claims characterized in that the size and shape of the motifs (301) is micrometer. 24. Process according to any of claims 1-22, characterized in that the size and shape of the motifs (301) is macrometer.