Congratulations that you have got your OpenSK USB dongle, now you can try FIDO functions to do fast online authentication. OpenSK implements [FIDO2(CTAP2)](https://fidoalliance.org/fido2/) and FIDO U2F specifications, it can support any website leveraging [W3C WebAuthN](https://www.w3.org/TR/webauthn/).
1. Please refer to [Microsoft Document](https://docs.microsoft.com/en-us/azure/active-directory/user-help/security-info-setup-security-key#manage-your-security-key-settings-from-windows-settings "Manage your security key settings from Windows Settings") for detailed information.
2.**Security Key** option in **Windows Settings** is only available from Windows 10 1903.
1. From Chrome browser, open URL **chrome://settings/securityKeys**, or open menu "Settings” => “Privacy and security” (More)=> “Manage security keys”.
There are a lot of online services that can use FIDO2/U2F to do 2FA or passwordless authentication, please refer to [FEITIAN website](https://www.ftsafe.com/article/620.html) and click corresponding service ICON to learn.
Here just emphasize services from two big FIDO players, Google and Microsoft.
### Google
#### - Google 2-Step Verification
- Please refer to [Google's help](https://support.google.com/accounts/answer/185839?co=GENIE.Platform%3DAndroid&hl=en) to bind OpenSK to your Google services. Or
- Take a look at 2.1 of [Feitian's help document](https://www.ftsafe.com/download/webdownload/FIDO/Manual/FEITIAN%20U2F%20scenarios%20instructions.pdf) to bind and try OpenSK instead of ePass FIDO security key.
- Please refer to [landing page](https://landing.google.com/advancedprotection/) or [help page](https://support.google.com/accounts/answer/7519408?co=GENIE.Platform%3DAndroid&hl=en&oco=0) of Google Advanced Protection to get how to setup.
When you add a security to Google services, you may encount problem because OpenSK uses self attestation. So plesae click "Skip" when Chrome prompts "allow this site to see your security key? google.com wants to see the make and model of your security key."
- Please refer to [Microsoft Blog](https://www.microsoft.com/en-us/microsoft-365/blog/2018/11/20/sign-in-to-your-microsoft-account-without-a-password-using-windows-hello-or-a-security-key/) to learn how to do Microsoft Account Passwordless Logon with FIDO2 security keys. Or
- Take a look at Chapter 2.2 of [FEITIAN FIDO2 scenarios](https://download.ftsafe.com/files/FIDO/fido2/FEITIAN%20FIDO2%20scenarios%20instructions.pdf) to configure OpenSK with Microsoft Account step by step.
### Others
Surely there are a lot of other online services except for Google's and Microsoft's, you can learn from
- [FIDO2 Scenarios](https://download.ftsafe.com/files/FIDO/fido2/FEITIAN%20FIDO2%20scenarios%20instructions.pdf) and [U2F Scenarios](https://www.ftsafe.com/download/webdownload/FIDO/Manual/FEITIAN%20U2F%20scenarios%20instructions.pdf) from Feitian's resources.