Abstract: An identification device includes a ring incorporating at least one radiofrequency transponder which includes a microcontroller. The microcontroller includes at least one memory having data storage areas and at least one antenna configured to emit an electromagnetic field carrying identification information. The identification device further includes at least one photosensitive element positioned on an inner face of the ring. The photosensitive element is configured to generate a current when the photosensitive element is illuminated, in order to cause a deterioration of the memory area storing the data.

Abstract: An identification device includes a ring incorporating at least one radiofrequency transponder which includes at least one microcontroller and at least one antenna to emit an electromagnetic field conveying identification data. The identification device further includes an electrical circuit having at least one light-sensitive element. The electrical circuit is mounted electrically between the microcontroller and the antenna such that, when the light-sensitive element receives light, the light-sensitive element acts in a first state as an open switch to electrically isolate the antenna with respect to the microcontroller. When the light-sensitive element is masked, the light-sensitive element acts in a second state as a closed switch, so as to establish an electrical connection between the antenna and the microcontroller in order to permit a current originating from electromagnetic induction of the antenna to flow.