According to reports, Radio frequency identification (RFID), an electronic-tagging technology, could be used to make jewellery more secure. %%In February this year, scientists at Hitachi Research Labs in Japan developed the smallest and thinnest RFID chip in the world to date measuring 0.05 mm by 0.05 mm2 – smaller than a pepper flake or a grain of sand. In fact, the chips are so small that they can be mixed with paper pulp for making currency and passports, offering an added layer of protection.%%The drastic decrease in chip size makes it possible to embed the electronic tag – which stores a unique 38-digit ID number – in rings and necklaces, making them easier to trace, as per the report. %%The chip wirelessly emits its unique code when interrogated by an RFID reader, which is almost impossible to counterfeit.