What is two-factor authentication?

Two-factor authentication is an enhanced security measure requiring a second passcode in addition to username and password. You can set up two-factor authentication for account login, funding, trading and API actions. Set these up under the security tab on your account screen (Account > Security). At the very least, you should set up two-factor authentication for account login. Two-factor authentication for funding and trading should always be used in conjunction with the Global Settings Lock.