diff --git a/src/security/validator-null.hpp b/src/security/validator-null.hpp
index 1bb6d01..3a0c3b2 100644
--- a/src/security/validator-null.hpp
+++ b/src/security/validator-null.hpp
@@ -1,9 +1,16 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
 /**
- * Copyright (C) 2013 Regents of the University of California.
- * @author: Yingdi Yu <yingdi@cs.ucla.edu>
- * @author: Jeff Thompson <jefft0@remap.ucla.edu>
- * See COPYING for copyright and distribution information.
+ * Copyright (c) 2013-2014,  Regents of the University of California.
+ * All rights reserved.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ *
+ * This file licensed under New BSD License.  See COPYING for detailed information about
+ * ndn-cxx library copyright, permissions, and redistribution restrictions.
+ *
+ * @author Yingdi Yu <http://irl.cs.ucla.edu/~yingdi/>
+ * @author Jeff Thompson <jefft0@remap.ucla.edu>
  */
 
 #ifndef NDN_SECURITY_VALIDATOR_NULL_HPP