 Since the discovery of this attack, NXP is officially recommending to migrate from MIFARE Classic product-based systems to higher security products.In November 2010, security researchers from the Ruhr University released a paper detailing a side-channel attack against MIFARE product-based cards.The paper demonstrated that MIFARE DESFire product-based cards could be easily emulated at a cost of approximately $25 in "off the shelf" hardware.