Index: modules/system/system.install
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.install,v
retrieving revision 1.466
diff -u -p -r1.466 system.install
--- modules/system/system.install       12 May 2010 08:26:15 -0000      1.466
+++ modules/system/system.install       17 May 2010 17:40:17 -0000
@@ -421,6 +421,8 @@ function system_install() {
   // Populate the cron key variable.
   $cron_key = drupal_hash_base64(drupal_random_bytes(55));
   variable_set('cron_key', $cron_key);
+  $private_key = drupal_hash_base64(drupal_random_bytes(55));
+  variable_set('drupal_private_key', $private_key);
 }

 /**