Method for forming and detecting security elements on the surface of a component or in a component, and system for detecting said security element

A method for forming and detecting security elements on the surface (1a) of a component (1) and/or in a component (1), in which

• at least one layer or at least one region that is preferably formed of a magnetic material or of a material different from the component material is formed on the surface (1a) of the component (1) and/or in the component (1) that is formed of a magnetic or of a non-magnetic material in a locally and geometrically defined manner,
• wherein at least one ablated track (2), at least one heat-affected region (6) and/or at least one remelted treatment track (9) are/is formed by a locally and geometrically defined ablation of material or input of energy on/at the surface (1a) of a component (1) along a predefined contour corresponding to the respective security feature (S) or
• in the manufacture of the component (1), a magnetic material (16) different from the material of the component (1) is introduced into the component (1) at at least one predefined position in a locally and geometrically defined manner by way of a generative production process and
• to detect the security element (S), a magnetization unit is used to generate at least one magnetic field penetrating into the component (1) or a magnetic flux is produced inside the magnetization unit that penetrates into the component (1) and
• to check a security element (S) formed in this way, a detection unit (10) is used to detect the magnetic stray fields occurring on the security element (S) as a result of the at least one magnetic field, and the measurement signals captured by the detection unit are transferred to an evaluation unit having an image-processing or pattern-recognition system, and
• using the evaluation unit having an image-processing or pattern-recognition system, it is checked, by way of the detected magnetic stray fields, whether or not the detected security element (S) corresponds to a specification.