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https://support.wildstar-online.com/entries/53257786-Two-Step-Verification-Setting-Up-and-Rewards

What is WildStar Two-Step Verification?
Two-Step Verification is a system that requires you to prove your identity when logging into the game, in addition to inputting your normal account name and password. This is done using an app that you install on a mobile device. Apple® iOS, Google® Android, and Microsoft Windows® Phone are all supported. The app provides a special code that you are asked to enter after inputting your account name and password. This code is unique to your account and changes every 30 seconds. Whether you’re playing at home or from a public location, this extra layer of security will help keep your account safe by requiring mobile verification in addition to your regular log-in credentials.

To apply an authenticator to your account, please click the 'Add' link next to "2-Step Verification" on your account page here: https://account.wildstar-online.com/profile/index