Integrated circuit comprising: - a functional block configured to perform a plurality of logic and/or analog functions, - a protection device comprising: ∘ a control circuit configured to transmit at least a first signal and to receive a second signal, ∘ a receiver configured to receive the first signal and to transmit the second signal on receipt of the first signal, ∘ a first series of electrically conducting lines connecting the control circuit and the receiver to perform transit of the first signal, ∘ a second series of electrically conducting lines connecting the receiver and the control circuit to perform transit of the second signal, ∘ a plurality of monitoring stations simultaneously connected to the first and second series (8, 9) of electrically conducting lines to define a first elementary electric system in the first series of electrically conducting lines and a distinct second elementary electric system equivalent to the first elementary electric system in the second series of electrically conducting lines, ∘ a shield arranged to at least partially cover the functional block, the shield comprising a part of the assembly formed by the first and second series of electrically conducting lines, integrated circuit wherein the control circuit is configured to detect a modification of the first elementary electric system with respect to the second elementary electric system in the absence of receipt of the second signal after a predefined time-out. - a functional block configured to perform a plurality of logic and/or analog functions, - a protection device comprising: ∘ a control circuit configured to transmit at least a first signal and to receive a second signal, ∘ a receiver configured to receive the first signal and to transmit the second signal on receipt of the first signal, ∘ a first series of electrically conducting lines connecting the control circuit and the receiver to perform transit of the first signal, ∘ a second series of electrically conducting lines connecting the receiver and the control circuit to perform transit of the second signal, ∘ a plurality of monitoring stations simultaneously connected to the first and second series (8, 9) of electrically conducting lines to define a first elementary electric system in the first series of electrically conducting lines and a distinct second elementary electric system equivalent to the first elementary electric system in the second series of electrically conducting lines, ∘ a shield arranged to at least partially cover the functional block, the shield comprising a part of the assembly formed by the first and second series of electrically conducting lines, ∘ a control circuit configured to transmit at least a first signal and to receive a second signal, ∘ a receiver configured to receive the first signal and to transmit the second signal on receipt of the first signal, ∘ a first series of electrically conducting lines connecting the control circuit and the receiver to perform transit of the first signal, ∘ a second series of electrically conducting lines connecting the receiver and the control circuit to perform transit of the second signal, ∘ a plurality of monitoring stations simultaneously connected to the first and second series (8, 9) of electrically conducting lines to define a first elementary electric system in the first series of electrically conducting lines and a distinct second elementary electric system equivalent to the first elementary electric system in the second series of electrically conducting lines, ∘ a shield arranged to at least partially cover the functional block, the shield comprising a part of the assembly formed by the first and second series of electrically conducting lines,