“Unlike regular ATMs, there is no single set of verification or security standards for Bitcoin ATMs. For example, instead of requiring an ATM, credit, or debit card for transactions, a Bitcoin ATM involves the use of mobile numbers and ID cards for user identity verification,” wrote Senior Threat Researcher at Trend Micro, Fernando Merces. “The user then has to input a wallet address or scan its QR code. The wallets used to store digital currencies are not standardized either and are often downloaded from app stores, posing another security problem.”