With a signature based on superparamagnetic and / or soft magnetic nanoparticles coated article, a process for its production and use of superparamagnetic and / or soft magnetic nanoparticles for securing articles against counterfeiting and piracy

The present invention relates to a provided with a security signature subject, wherein the signature superparamagnetic and / or soft magnetic nanoparticles includes or consists thereof. The signature can comprise further components selected from among ferromagnetic particles, luminescent nanoparticles and electrically conductive nanoparticles and thermochromic substances. The invention also relates to methods for producing the security signature of the article and a sensor, with which the authenticity of the signature can be detected.