We support Two Factor Authentication, and strongly encourage this for all users. We utilize the one-time-password method for Two Factor Authentication, due to its higher security in comparison to SMS-based authentication. You can enable Two Factor Authentication under Settings -> Two Factor Authentication.
Additionally, we provide a Security Lock feature where you can require Biometric Authentication (Face ID / Touch ID) or a PIN code for all transactions (enable under Settings -> Security Lock).
Finally, we require a separate email confirmation for all new Withdrawal addresses and bank accounts, as an additional layer of security.