diff --git a/include/ndn-cpp/security/certificate/certificate-extension.hpp b/include/ndn-cpp/security/certificate/certificate-extension.hpp
index 5990cd4..d71086b 100644
--- a/include/ndn-cpp/security/certificate/certificate-extension.hpp
+++ b/include/ndn-cpp/security/certificate/certificate-extension.hpp
@@ -1,6 +1,7 @@
 /* -*- 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.
  */
diff --git a/include/ndn-cpp/security/certificate/identity-certificate.hpp b/include/ndn-cpp/security/certificate/identity-certificate.hpp
index 1dff7e9..8cb244d 100644
--- a/include/ndn-cpp/security/certificate/identity-certificate.hpp
+++ b/include/ndn-cpp/security/certificate/identity-certificate.hpp
@@ -19,7 +19,9 @@
   /**
    * The default constructor.
    */
-  IdentityCertificate();
+  IdentityCertificate()
+  {
+  }
 
   /**
    * Create an IdentityCertificate from the content in the data packet.
@@ -32,11 +34,12 @@
    */
   virtual 
   ~IdentityCertificate();
-    Data &
-    setName (const Name& name);
+  
+  Data &
+  setName(const Name& name);
 
   virtual Name 
-  getPublicKeyName () const;
+  getPublicKeyName() const;
 
   static bool
   isIdentityCertificate(const Certificate& certificate);