diff --git a/src/common.hpp b/src/common.hpp
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014-2015,  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.
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * 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/>.
+ */
+
+#ifndef NDN_GEP_COMMON_HPP
+#define NDN_GEP_COMMON_HPP
+
+#include "config.hpp"
+
+#ifdef WITH_TESTS
+#define VIRTUAL_WITH_TESTS virtual
+#define PUBLIC_WITH_TESTS_ELSE_PROTECTED public
+#define PUBLIC_WITH_TESTS_ELSE_PRIVATE public
+#define PROTECTED_WITH_TESTS_ELSE_PRIVATE protected
+#else
+#define VIRTUAL_WITH_TESTS
+#define PUBLIC_WITH_TESTS_ELSE_PROTECTED protected
+#define PUBLIC_WITH_TESTS_ELSE_PRIVATE private
+#define PROTECTED_WITH_TESTS_ELSE_PRIVATE private
+#endif
+
+/** \def DECL_OVERRIDE
+ *  \brief expands to 'override' if compiler supports this feature, otherwise expands to nothing
+ */
+#ifdef HAVE_CXX_OVERRIDE
+#define DECL_OVERRIDE override
+#else
+#define DECL_OVERRIDE
+#endif
+
+#include <cstddef>
+#include <list>
+#include <map>
+#include <set>
+#include <queue>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+
+#include <ndn-cxx/common.hpp>
+#include <ndn-cxx/interest.hpp>
+#include <ndn-cxx/data.hpp>
+#include <ndn-cxx/util/signal.hpp>
+
+#include <boost/algorithm/string.hpp>
+#include <boost/asio.hpp>
+#include <boost/assert.hpp>
+#include <boost/lexical_cast.hpp>
+#include <boost/noncopyable.hpp>
+#include <boost/property_tree/ptree.hpp>
+
+namespace ndn {
+namespace gep {
+
+using std::size_t;
+
+using boost::noncopyable;
+
+using std::shared_ptr;
+using std::unique_ptr;
+using std::weak_ptr;
+using std::bad_weak_ptr;
+using std::make_shared;
+using std::enable_shared_from_this;
+
+using std::static_pointer_cast;
+using std::dynamic_pointer_cast;
+using std::const_pointer_cast;
+
+using std::function;
+using std::bind;
+using std::ref;
+using std::cref;
+
+using ndn::Interest;
+using ndn::Data;
+using ndn::Name;
+using ndn::Exclude;
+using ndn::Block;
+
+namespace tlv {
+using namespace ndn::tlv;
+} // namespace tlv
+
+namespace name = ndn::name;
+namespace time = ndn::time;
+namespace signal = ndn::util::signal;
+
+} // namespace gep
+} // namespace ndn
+
+#endif // NDN_GEP_COMMON_HPP