diff --git a/src/decrypt-key.hpp b/src/decrypt-key.hpp
index df45428..4c61099 100644
--- a/src/decrypt-key.hpp
+++ b/src/decrypt-key.hpp
@@ -1,29 +1,29 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2014-2015,  Regents of the University of California
+ * Copyright (c) 2014-2018, Regents of the University of California
  *
- * This file is part of ndn-group-encrypt (Group-based Encryption Protocol for NDN).
- * See AUTHORS.md for complete list of ndn-group-encrypt authors and contributors.
+ * This file is part of NAC (Name-Based Access Control for NDN).
+ * See AUTHORS.md for complete list of NAC authors and contributors.
  *
- * ndn-group-encrypt 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.
+ * NAC 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.
  *
- * ndn-group-encrypt 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.
+ * NAC 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
- * ndn-group-encrypt, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ * NAC, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef NDN_GEP_DECRYPT_KEY_HPP
-#define NDN_GEP_DECRYPT_KEY_HPP
+#ifndef NDN_NAC_DECRYPT_KEY_HPP
+#define NDN_NAC_DECRYPT_KEY_HPP
 
 #include "encrypt-key.hpp"
 
 namespace ndn {
-namespace gep {
+namespace nac {
 
 template<class Algorithm>
 class DecryptKey
@@ -56,7 +56,7 @@
   Buffer m_keyBits;
 };
 
-} // namespace gep
+} // namespace nac
 } // namespace ndn
 
-#endif // NDN_GEP_DECRYPT_KEY_HPP
+#endif // NDN_NAC_DECRYPT_KEY_HPP