Index: openbox-3.6.1/data/rc.xml
===================================================================
--- openbox-3.6.1/data/rc.xml
+++ openbox-3.6.1/data/rc.xml	2018-02-26 13:52:39.181577514 +0100
@@ -191,6 +191,12 @@
 
 <keyboard>
   <chainQuitKey>C-g</chainQuitKey>
+  <!-- Keybinding for launching xscreensaver in locked mode. -->
+  <keybind key="C-A-l">
+    <action name="Execute">
+      <command>xscreensaver-command -lock</command>
+    </action>
+  </keybind>
 
   <!-- Keybindings for desktop switching -->
   <keybind key="C-A-Left">
Index: openbox-3.6.1/data/autostart/autostart.in
===================================================================
--- openbox-3.6.1/data/autostart/autostart.in
+++ openbox-3.6.1/data/autostart/autostart.in	2018-02-26 13:54:55.611660191 +0100
@@ -15,3 +15,6 @@
 # If you want to use XFCE config tools...
 #
 #xfce-mcs-manager &
+
+# Start xscreensaver on login
+# xscreensaver -no-splash &