diff --git a/ChangeLog b/ChangeLog
index be7fec7..e55ae53 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2014-03-26  Richard Frith-Macdonald <rfm@gnu.org>
+
+	EcControl.m: Add option to allow any user to log in.
+
 2014-03-25  Richard Frith-Macdonald <rfm@gnu.org>
 
 	* EcConsole.m: Don't read from stdin whn in non-interactive mode
diff --git a/EcControl.m b/EcControl.m
index 5c5853a..2695649 100644
--- a/EcControl.m
+++ b/EcControl.m
@@ -1967,6 +1967,14 @@ static NSString*	cmdWord(NSArray* a, unsigned int pos)
       NSDictionary	*info = [operators objectForKey: s];
       NSString		*passwd = [info objectForKey: @"Password"];
 
+      if (nil == info)
+        {
+          /* If Operators.plist contains a user with an empty string as
+           * a name, this will match any login attempt not already matched.
+           */
+          info = [operators objectForKey: @""];
+          passwd = [info objectForKey: @"Password"];
+        }
       if (info == nil)
 	{
 	  m = [NSString stringWithFormat:
diff --git a/Operators.plist b/Operators.plist
index e8e64db..b851696 100644
--- a/Operators.plist
+++ b/Operators.plist
@@ -6,4 +6,18 @@
   richard = {
     Password = richard;
   };
+
+  /* If the entry with no name exists, it will be used to allow login for
+   * any username which doesn't exist in this file.
+   */
+  "" = {
+    Password = password;
+  };
+
+  /* If Password is omitted or is empty, then any password is accepted
+   * to allow the user to log in.
+   */
+  guest = {
+    Password = "";
+  };
 }