Look at the products you buy at the store (supermarket, Walmart, Target, etc) - the barcode is almost always EAN (now IAN)¹ There are exceptions for smaller it

Look at the products you buy at the store (supermarket, Walmart, Target, etc) - the barcode is almost always EAN (now IAN)¹ There are exceptions for smaller items like packs of gum, which use UPC-E² encoding (if the manufacturer portion ends in zeros). Hundreds of thousands of products being purchased by billions of people mean they're the dominant barcode system. So far as attacks via UPC/EAN/IAN, they're not really possible as it only encodes digits, and only 13 of them. ¹ https://en.wikipedia.org/wiki/International_Article_Number_(EAN) https://en.wikipedia.org/wiki/International_Article_Number_(... ² http://www.barcodeisland.com/upce.phtml http://www.barcodeisland.com/upce.phtml