In order to ensure your funds security, we suggest you enable 2FA (Two-Factor Authentication) in your account.
Firstly, download "Google Authenticator" on your phone via App Store or Android Market.
Secondly, scan the QR code or manually add an account in Google Authenticator (enter the 16-bit key over the QR code).
And finally enter your login, password and the 6-digit number in "Google Authenticator".