TY - CONF A1 - Hönig, D. T1 - Optical Layer Systems for Product Authentication: Interference, Scattering, Light Diffusion and Ellipsometric Encoding as Public, Hidden and Forensic Security Features T2 - PSE 2012, 13 th International Conference on Plasma Surface Engineering CY - Garmisch-Partenkirchen, Germany DA - 2012-09-10 PY - 2012 AN - OPUS4-26140 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -