Cryptal uses two-factor authentication (2FA) for all logins and withdrawals. By default, e-mail authentication is set, meaning you will get a one-time password e-mailed to you every time you log in. You should change this to use Google Authenticator, which is an app available for Android and iOS that generates codes for you. You can also use other compatible TOTP apps for this purpose.

In your profile settings, enable your preferred 2FA option: