Abstract: A GNSS enabled device configured to process pulse per second (PPS) signals, in particular from a GNSS satellite constellation to determine a global position of the GNSS enabled device. The device comprises a GNSS receiver module configured to acquire the PPS signals, a computing unit, and a reference timer comprising a local reference clock and a timer circuit to measure periods of said PPS signals. The computing unit and reference timer are configured to measure a variance in jitter of said PPS signals to determine whether the received PPS signal is genuine or spoofed.

Abstract: An electronic monitoring bracelet, comprising a ring-shaped body (2) configured so as to be mounted around a limb or an object, and an electronic monitoring system positioned in the body, the electronic monitoring system comprising an integrity detection system (4) and an internal source of energy (12). The ring-shaped body (2) is in the form of a rigid shell containing a chamber or several chamber sections in which are positioned components of the electronic monitoring system, the ring-shaped body entirely encircling the bracelet.