Product embodying a physical unclonable function

摘要

The invention is directed to products embodying a PUF. A method for manufacturing such a product is disclosed which relies on a material having one surface with "deterministic" asperities. The method further uses particles dimensioned such as to be able to be trapped by the asperities of the surface. Generally, the method enables particles (20) to randomly deposit on and get trapped by asperities (14) of the material surface (12), such as to obtain a pattern that forms the PUF. The resulting PUF is made easier to read out since the general pattern and the location of the particles are known. Only the filling level (of a given type) of the particles is random.