diff --git a/Encrypter.php b/Encrypter.php
index 05c15e9..21f256d 100755
--- a/Encrypter.php
+++ b/Encrypter.php
@@ -59,6 +59,17 @@ public static function supported($key, $cipher)
                ($cipher === 'AES-256-CBC' && $length === 32);
     }
 
+    /**
+     * Create a new encryption key for the given cipher.
+     *
+     * @param  string  $cipher
+     * @return string
+     */
+    public static function generateKey($cipher)
+    {
+        return random_bytes($cipher == 'AES-128-CBC' ? 16 : 32);
+    }
+
     /**
      * Encrypt the given value.
      *