diff --git a/Utils/Encoding/EncodingInterface.php b/Utils/Encoding/EncodingInterface.php
index 9db9ea670..c1ce2fdb1 100644
--- a/Utils/Encoding/EncodingInterface.php
+++ b/Utils/Encoding/EncodingInterface.php
@@ -38,7 +38,7 @@ interface EncodingInterface
      * @since  1.0.0
      * @author Dennis Eichhorn <d.eichhorn@oms.com>
      */
-    public function encode($source);
+    public static function encode($source);
 
     /**
      * Dedecodes text
@@ -50,5 +50,5 @@ interface EncodingInterface
      * @since  1.0.0
      * @author Dennis Eichhorn <d.eichhorn@oms.com>
      */
-    public function decode($decoded);
+    public static function decode($decoded);
 }
\ No newline at end of file
diff --git a/Utils/Encoding/Xor.php b/Utils/Encoding/Xor.php
index 75bf966b2..86428bab3 100644
--- a/Utils/Encoding/Xor.php
+++ b/Utils/Encoding/Xor.php
@@ -16,7 +16,7 @@
 namespace phpOMS\Utils\Encoding;
 
 /**
- * Gray encoding class
+ * XOR encoding class
  *
  * @category   Framework
  * @package    phpOMS\Utils