An electronic system comprising a printed circuit having first and second opposite surfaces, an electronic component attached to the second surface and a first device of protection against access attempts on the first surface side. The system comprises a second protection device at least partially covering, on the second surface side, the electronic component, and comprising at least one tab. The printed circuit comprises at least one through opening, the tab extending in the opening and being attached to the printed circuit. The tab comprises at least one conductive portion electrically contacting at least one first conductive track of the first surface.