diff --git a/.sops.yaml b/.sops.yaml
new file mode 100644
index 0000000..8d0d445
--- /dev/null
+++ b/.sops.yaml
@@ -0,0 +1,8 @@
+keys:
+  - &tdpeuter_Tibo-NixTop age1qzutny0mqpcccqw6myyfntu6wcskruu9ghzvt6r4te7afkqwnguq05ex37
+
+creation_rules:
+  - path_regex: secrets/[^/]+\.(yaml|json|env|ini)$
+    key_groups:
+    - age:
+        - *tdpeuter_Tibo-NixTop
diff --git a/flake.nix b/flake.nix
index 7701f3a..446f4ce 100644
--- a/flake.nix
+++ b/flake.nix
@@ -5,6 +5,10 @@
     nixpkgs.url = "nixpkgs/nixos-unstable";
 
     flake-utils.url = "github:numtide/flake-utils";
+    sops-nix = {
+      url = "github:Mic92/sops-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
     utils = {
       url = "github:gytis-ivaskevicius/flake-utils-plus";
       inputs.flake-utils.follows = "flake-utils";
@@ -13,11 +17,11 @@
 
   outputs = inputs@{
     self, nixpkgs,
-    flake-utils, utils,
+    flake-utils, sops-nix, utils,
     ...
   }:
   let
-    system = "x86_64-linux";
+    system = utils.lib.system.x86_64-linux;
   in
   utils.lib.mkFlake {
     inherit self inputs;
@@ -28,6 +32,8 @@
       modules = [
         ./modules
         ./users
+
+        sops-nix.nixosModules.sops
       ];
     };
 
diff --git a/secrets/secrets.yaml b/secrets/secrets.yaml
new file mode 100644
index 0000000..e17dab1
--- /dev/null
+++ b/secrets/secrets.yaml
@@ -0,0 +1,19 @@
+users:
+    admin:
+        authorized_keys:
+            NixOS: ENC[AES256_GCM,data:sj2hkUkWp628KuXp+AnncLdawHpxb9fH1ZHnIisP0x9Tght9+/X2sWHpuMSeqi2i/R8B+Wgte66QkuwAOB0j+oB9N+66EhehmWZlK5hD/22p,iv:z18U+LvAQgPDfBBewE3lJmWZd0NGCPwJIe/h3tupuZc=,tag:ZJar3spO66JbDXygdTHh2w==,type:str]
+sops:
+    age:
+        - recipient: age1qzutny0mqpcccqw6myyfntu6wcskruu9ghzvt6r4te7afkqwnguq05ex37
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBjUSt2REk2Mmd0bk9ubjJk
+            dXFiY2JNR1dyZW9qTUdzaWZhY3c3amVwQzA0CkZHNVpZVjhsWXhVQVNaR0xONzhh
+            Y0lQaWNaNmpYYVdrRnZIZUhvUFUzcWMKLS0tIDAvSmF0VmpxcnZEQStXUjNCUE5Z
+            RnA2Lzk2WHFxOEh6dHN0aGhVSVpLTW8KA7IOvGDMBtgo4pe0Sw3Lol243xCDAJ4i
+            PhcJFiUObVRFZN7ISlULnOlTO3pT9jWvvmC5rDZWId3PQ8qjPvnOUg==
+            -----END AGE ENCRYPTED FILE-----
+    lastmodified: "2025-10-04T17:33:22Z"
+    mac: ENC[AES256_GCM,data:I7I7uDFEWfw9+4KROtjHMVhaxYrVK5QmLfFZShSajF0A2Zxu9lg+fDGiMHk40JC5zD31P70QS/ipye1mBGQbCbLEA7uBUhNzZ7G1g58cIXF6vSGmt0fovm0MVSxEJ44r05fx6uT4OJu5BYVxYSlG84gTj9rCFXxxcBJMrh+6yaI=,iv:c1vudsp9bg0Pc2ddRyvWn6Tf0LhqNuEjxG9D4PpHqxs=,tag:K/1PSHhrTdsNPcPmRv/2Ew==,type:str]
+    unencrypted_suffix: _unencrypted
+    version: 3.10.2
diff --git a/users/admin/default.nix b/users/admin/default.nix
index 552909b..bc3ccc7 100644
--- a/users/admin/default.nix
+++ b/users/admin/default.nix
@@ -2,6 +2,8 @@
 
 let
   cfg = config.homelab.users.admin;
+
+  owner = config.users.users.admin.name;
 in {
   options.homelab.users.admin.enable = lib.mkEnableOption "user System Administrator";
 
@@ -10,6 +12,12 @@ in {
       config.users.users.admin.name
     ];
 
+    sops.secrets."users/admin/authorized_keys" = {
+      format = "yaml";
+      sopsFile = ../../secrets/secrets.yaml;
+      inherit owner;
+    };
+
     users.users.admin = {
       description = "System Administrator";
       isNormalUser = true;
@@ -17,9 +25,8 @@ in {
         config.users.groups.wheel.name # Enable 'sudo' for the user.
       ];
       initialPassword = "ChangeMe";
-      openssh.authorizedKeys.keys = [
-        # TODO ChangeMe
-        "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPrG+ldRBdCeHEXrsy/qHXIJYg8xQXVuiUR0DxhFjYNg"
+      openssh.authorizedKeys.keyFiles = [
+        /run/secrets/users/admin/authorized_keys
       ];
       packages = with pkgs; [
         curl