The invention relates to method and device for protection and control of originality of products and their components and electronically readable certificate thereof. Depending on the structure of product (1) an alloying layer (2) is deposited over the product. The layer (2) is affected by a subsequent controlled beam or jet marking carried out by means of a beam (3) depositing a restorable marking (4). In order to control or recover the marking the surface, the conductivity and the structure of the marked part is scanned in the area where the marking is deposited. The acquired image of the encoding elements of the markings is compared with information that contains relevance between the original marking and the encoded restorable elements. The information is recorded in a database as well on the accompanying electronically readable certificate (12) protected by means of a multimedia encrypted marking (13) against manipulation or counterfeit.