The integrated circuit includes a functional block performing a logic and/or analog function. A control circuit is configured to transmit at least a first signal to the receiver and receive a second signal from receiver. The electrically conducting lines' first and second series connect the control circuit and receiver to perform the first and second signals' transit. A plurality of monitoring stations is simultaneously connected to first and second series of electrically conducting lines to define a first elementary electric pattern in the electrically conducting lines' first series and a distinct second elementary electric pattern equivalent to first elementary electric pattern in the electrically conducting lines' second series. A shield at least partially covers the functional block. The control circuit is configured to detect modification of first elementary electric pattern with respect to the second elementary electric pattern by absence of receipt of the second signal after a predefined time-out.