changed key comparison to be loosely typed, so an error would be triggered when an empty string is attempted to be used as an encryption key
diff --git a/system/libraries/Encrypt.php b/system/libraries/Encrypt.php
index c893fbf..44fdce0 100644
--- a/system/libraries/Encrypt.php
+++ b/system/libraries/Encrypt.php
@@ -72,7 +72,7 @@
 			$CI =& get_instance();
 			$key = $CI->config->item('encryption_key');
 
-			if ($key === FALSE)
+			if ($key == FALSE)
 			{
 				show_error('In order to use the encryption class requires that you set an encryption key in your config file.');
 			}