One-Time Passwords have been introduced as a means of
further securing your Square Enix account.

"One-Time Password" describes a six-digit number shown on a screen using either a key-ring like Security Token or a smartphone application known as a Software Token.
One-Time Passwords are only effective for a fixed period of time and become invalid once the user logs in, making them exceptionally useful against spyware such as key logging programs.
By using a One-Time Password in combination with your Square Enix ID and password, you will be able to further secure your account.
Please refer to the "What is a Security Token?" and "What is the Software Token?" below for instructions on how to start using the One-Time Password system.

A Security Token is a device for displaying One-Time Passwords. Pressing the button will show a One-Time Password on the device’s LCD screen. Using such a device will dramatically improve account security. Square Enix Security Tokens may be purchased for $9.99.

Purchase a Security Token

The Software Token is a smartphone application designed to display One-Time Passwords. After registering for the service, a One-Time Password will be shown on screen every time the application is launched. Using this application will dramatically improve account security. The application itself is free to use.
The application can only be used by customers with Square Enix accounts who have purchased either FINAL FANTASY XI or FINAL FANTASY XIV and registered the accompanying registration codes.
As of September 1, 2013, the security token will cost $14.99.
Read on for more information about the price adjustment.

Begin the Software Token activation procedure