Why you need 2nd Factor (U2F)?

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User Scenarios

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Add ATkey as a Security Key to your Account

Before you can use your Security Key, you’ll have to register it to your Google Account so that you can use it to sign in on any computer

understand more for U2F of Google

Security Key for safer logins your Facebook with a fingerprint touch

You can register ATKey to your account so that the next time you log in after enabling login approvals

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Understand more for U2F of ...

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DOWNLOAD USER GUIDE
User Guide (Windows 10)
User Guide (Mac OSX)