diff --git a/src/HashInterface.php b/src/HashInterface.php
index 66a79d9..f2cf14f 100644
--- a/src/HashInterface.php
+++ b/src/HashInterface.php
@@ -7,6 +7,7 @@ interface HashInterface
     public function hash(string $key, string $val): string;
     public function hashNumeric(string $key, int $val): string;
     public function hashType(): string;
+    public static function keygen(): string;
 }
 
 ?>