METHOD OF CODED MARKING OF A SMALL-SIZE PRODUCT, AND MARKED PRODUCT OBTAINED ACCORDING TO SAID METHOD

摘要

The method makes it possible to carry out an operation of coded marking on a small-size product, such as a watchmaking product (10) or jewellery product. The method consists firstly in carrying out a first mathematical operation for encrypting an identifier (13), such as a serial number of the product to be marked with the aid of a private key of a specific algorithm with a pair of private and public keys to obtain a first authenticator. The first authenticator comprises a first data length defined by a first large number of alphanumeric characters. This first authenticator is encrypted with the aid of a second mathematical operation using a function of the hash type to obtain a second authenticator. This second authenticator comprises a second data length defined by a second reduced number of alphanumeric characters that is smaller than the first number of characters. The second authenticator is converted into a coded image which is preferably a two-dimensional barcode (11) so as to be placed on the product in the guise of a coded mark so as to allow its authentication.