Like all security, privacy is hard, unless you use Tigo CTM devices.
TigoCTM was founded in 2014 by Bitcoin veterans Cindy Zimmerman and Judith Katzman. Initially a Lamassu teller machine upgrader, reseller, and operator, TigoCTM has decided to pivot to manufacturing a whole line of crypto-specialized machines, from desktops to smart phones and a whole new line of teller machines.