Matthew Dove: Pepper CEO Sings Praises of the ‘World’s Coolest Credit Card’. In: The Fintech Times. 22. April 2019, abgerufen am 10. Mai 2019 (englisch): „In addition, for each purchase made there is a two-step security process, similar to Apple Pay, which includes a one-time-use security code, backed up by additional verification via Face ID or Touch ID.“