> For the complete documentation index, see [llms.txt](https://docs.k9.io/key9-identity/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.k9.io/key9-identity/ssh/installation-and-setup/openssh-with-yubikey-fido2-protected-keys/4.-testing-your-ssh-key.md).

# 4. Testing your SSH key

To test, simply SSH to a target host configured with Key9.  You should be prompted for your PIN:

<figure><img src="/files/ZprmxdtZokXep83Sm7JD" alt=""><figcaption><p>Testing your ED25519-SK Key</p></figcaption></figure>