Parmigiano-Reggiano makers are putting edible microchips the size of a grain of sand into their 90-pound cheese wheels to combat counterfeiters::Italian Parmigiano-Reggiano makers are using microchips to verify the authenticity of their products and thwart scammers.
There exist (cheaper) cheeses made in a similar style, but no serious manufacturer will call it Parmigiano Reggiano, or even Parmesan. Usually have their own brand.
Or you can make your own https://youtu.be/s1k1w7SnNEY
Worth noting that they use microchips because blind taste tests, chemical analysis, and any other comparison demonstrates that copies are indistinguishable - if you buy prestige food products you’re almost certainly just wasting money