2-step verification enhances the security of user accounts. When the feature is enabled, users are required to specify a six-digit security code in addition to the account credentials during the login process.
To use 2-step verification, you must install an authenticator application on your mobile device. The application must implement verification services using the Time-based One-time Password Algorithm (TOTP). QTS supports Google Authenticator (for Android, iOS, and BlackBerry) and Authenticator (for Windows Phone).