Allright what is the technology that cant be forged or duplicated of today??
Well, you see it's possible to make a scannable SSI card which has a embedded digital image of the holder, plus fingerprint (thumbprint) data. If that info was accessible by read-only format from a national database (probably would require several) and the information was abled to be compared to that of the card via a card "reader" with a split screen output with the national data image displayed next to the card image, if the cardholder didn't appear to be the same persuasion as the national database entry and that within the card, one could fairly safely reason theft.