Two-factor authentication is a security measure used to ensure account activity is legitimate and authorized. Cryptal recommends Google Authenticator to provide one-time passcodes. Other compatible TOTP applications may also be used.
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To use Google Authenticator, download the app to your phone. |
Each Google Authenticator code is valid for 30 seconds, so only use a code while it is displayed. Otherwise, just use the next generated code. |
and then select Scan a QR code. Position your phone's camera lens in front of the code to add Cryptal