The present invention is directed to a composition comprising a white pigment or extended white pigment surface treated with a silane having at least one functional group capable of reacting with acids and anhydrides, at least one polymeric material and a compatibilizer. A first sacrificial layer is formed over an input signal line and an output signal line. The configuration permits a relatively high level of security against monitoring of the data transferred via the data bus, with a feasible level of additional circuit complexity.