diff --git a/system/core.nix b/system/core.nix
index 580d232..31741c2 100644
--- a/system/core.nix
+++ b/system/core.nix
@@ -59,7 +59,7 @@
     openssh = {
       enable = true;
       settings = {
-        PasswordAuthentication = true; # Enable password authentication.
+        PasswordAuthentication = false; # Enable password authentication.
         PermitRootLogin = "yes"; # Allow root login (not recommended for production).
       };
     };