Embodiment for forming an aggregate signal from a plurality of starting signals, comprising:acquiring said starting signals through respective sensors of a homogeneous sensors group;converting acquired signals in respective digital signals having data represented with a predetermined bits number;processing the digital signals to form aggregate signal.The processing step comprises the operations of:modifying digital signals changing the data format of each such digital signals from a first format to a second format, each data in the second format having been obtained from a respective data in the first format through an operation of permuting the bits position according to a permutation scheme associated with said data and to the specific digital signal comprising that data;forming aggregate signal obtaining said aggregate signal data by means of a bitwise logic operator acting upon said modified digital signal respective data.