diff --git a/src/algo/encrypt-params.hpp b/src/algo/encrypt-params.hpp
index 0aa03b2..030f443 100644
--- a/src/algo/encrypt-params.hpp
+++ b/src/algo/encrypt-params.hpp
@@ -1,8 +1,27 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014-2018,  Regents of the University of California
+ *
+ * This file is part of gep (Group-based Encryption Protocol for NDN).
+ * See AUTHORS.md for complete list of gep authors and contributors.
+ *
+ * gep is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * gep is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * gep, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #ifndef NDN_GEP_ENCRYPT_PARAMS_HPP
 #define NDN_GEP_ENCRYPT_PARAMS_HPP
 
-#include <ndn-cxx/encoding/buffer-stream.hpp>
 #include "../tlv.hpp"
+#include <ndn-cxx/encoding/buffer-stream.hpp>
 
 namespace ndn {
 namespace gep {