In a security marking method for marking polycarbonate-based product to inhibit at least one of piracy, unauthorized access and unauthorized copying of said product, at least one of tracking and authenticating a data message impregnated with at least one predetermined tracing substance providing the security marking used for at least one of tracking and authenticating said data message, the at least one predetermined tracing substance including predetermined concentration amounts of at least an isotope, a plurality of isotopes and a plurality of stable isotopes, and the predetermined tracing substance indicative of product information including at least two of a lot number, batch number, shipper, recipient, shipping date, manufacturer identity, manufacturing date and designated product purpose.