1. A process to make secure a personal portable object comprising a body of the personal portable object, a microchip, a printed image and a device to enable said personal portable object to communicate with an entity external to the device the process comprising: using an image file and an insertion algorithm to generate an image feature vector Vsi(num); storing the image feature vector Vsi(num) in the microchip; using the printed image obtained by a scanning device to generate an image feature vector Vsi(dig); and using a read-back algorithm to match the image feature vector Vsi(num) and the image feature vector Vsi(dig).