With a digital signature and its incorporation into a blockchain, for example, it is possible to check the authenticity and uniqueness of radio frequency identification tags used to track parts through a supply chain. The International Organization for Standardization (ISO) created a technical committee on blockchain and DLTs (ISO/TC 307).173 The standardization sector of the International Telecommunication Union (ITU) established a focus group on applying DLT. The European Telecommunications Standards Institute (ETSI) produces a variety of standards in the telecommunications industry, including those that enabled key global technologies, such as GSM'“, 3G, 4G, DECT™ and smart cards.