security: Implement interface to IdentityManager.
diff --git a/ndn-cpp/security/certificate/certificate.hpp b/ndn-cpp/security/certificate/certificate.hpp
new file mode 100644
index 0000000..29626b3
--- /dev/null
+++ b/ndn-cpp/security/certificate/certificate.hpp
@@ -0,0 +1,22 @@
+/* -*- 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.
+ */
+
+#ifndef NDN_CERTIFICATE_HPP
+#define NDN_CERTIFICATE_HPP
+
+#include "../../data.hpp"
+
+namespace ndn {
+
+class Certificate : public Data {
+
+};
+
+}
+
+#endif