diff --git a/src/Illuminate/Contracts/Encryption/Encrypter.php b/src/Illuminate/Contracts/Encryption/Encrypter.php
index 5ac1102ebc29..ee555eaa245f 100644
--- a/src/Illuminate/Contracts/Encryption/Encrypter.php
+++ b/src/Illuminate/Contracts/Encryption/Encrypter.php
@@ -32,4 +32,18 @@ public function decrypt($payload, $unserialize = true);
      * @return string
      */
     public function getKey();
+
+    /**
+     * Get the current encryption key and all previous encryption keys.
+     *
+     * @return array
+     */
+    public function getAllKeys();
+
+    /**
+     * Get the previous encryption keys.
+     *
+     * @return array
+     */
+    public function getPreviousKeys();
 }