How to enable Two-factor Authorization?
2-factor authentication is the process where an additional piece of information is requested along with your username and password, and it is required in order to sign into your account.
To enable Two-Factor Authorization, go to the SETTINGS section and click on the "Security" tab.
Install the special Google Authenticator application on your smartphone to generate one-time passwords.
Activation via Google Authenticator
Download and install Google Authenticator for iPhone / Android / Windows Phone and start activation. Scan the displayed QR code by Google Authenticator and enter the generated code.
What are one-time OTP passwords?
One time password (OTP) is a password that is valid for only one authentication session. The one-time password can also be limited to a certain period of time. The advantage of a one-time password over a static one is that the password cannot be reused. Thus, an attacker who intercepted data from a successful authentication session cannot use the copied password to gain access to the protected system.