METHOD FOR MAKING SECURE A PERSONAL PORTABLE OBJECT

摘要

The invention concerns a method for making secure a personal portable object comprising an object body (11), a silicon chip (12), an image print (13) and means allowing the object to communicate with the outside world. The invention is characterized in that the method comprises the following steps: generating, from an image file, a pseudorandom sequence and an insertion algorithm, a vector of the image characteristics Vsi(num), of a secret key S and of the image signature stored in the silicon chip; generating, from a signal of the image print captured by a capture apparatus and from the secret key S, a vector of image characteristics Vsi(dig); and comparing, with a playback algorithm, the vectors of image characteristics Vsi(num) and Vsi(dig). The invention is applicable in particular to smart cards.