The invention is a method for authenticating a device which comprises a chip and a body carrying the chip. The body comprises a graphical security feature. The method comprises the steps of: running a first physical unclonable function for generating a first response representative of the chip, extracting a first reference from the graphical security feature, authenticating the device by checking that said first response and first reference are linked by a preset mathematical function. The extracting step and the authenticating step are carried out by a machine distinct from the device.