diff --git a/infrastructure-guide/home.md b/infrastructure-guide/home.md
index aa8fd728..9ac622b9 100644
--- a/infrastructure-guide/home.md
+++ b/infrastructure-guide/home.md
@@ -52,4 +52,15 @@ Access to the redhat.com knowledge base:
 * [SSH config](sshconf)
 
 # HTTPS Certificates
-* [HTTPS Certificates](https_certificates)
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+* [HTTPS Certificates](https_certificates)
+
+# SSH Certificates / Signing Public User Keys
+
+Use the ca certificate that is on the "Kai special USB stick" (the certificate permissions needs to be 600 !)
+
+The signing is done like this:
+```bash
+ssh-keygen -s user-ca -I <username> -n <username> -V +55w id_ed25519.pub
+```
+
+More details on how this works can be found in this article: https://engineering.fb.com/2016/09/12/security/scalable-and-secure-access-with-ssh/
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