diff --git a/model/sync-ccnx-wrapper.cc b/model/sync-ccnx-wrapper.cc
new file mode 100644
index 0000000..2680859
--- /dev/null
+++ b/model/sync-ccnx-wrapper.cc
@@ -0,0 +1,21 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2012 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Zhenkai Zhu <zhenkai@cs.ucla.edu>
+ *         卞超轶 Chaoyi Bian <bcy@pku.edu.cn>
+ *	   Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
diff --git a/model/sync-ccnx-wrapper.h b/model/sync-ccnx-wrapper.h
new file mode 100644
index 0000000..ee7d3d8
--- /dev/null
+++ b/model/sync-ccnx-wrapper.h
@@ -0,0 +1,100 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2012 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Zhenkai Zhu <zhenkai@cs.ucla.edu>
+ *         卞超轶 Chaoyi Bian <bcy@pku.edu.cn>
+ *	   Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#ifndef SYNC_STATE_H
+#define SYNC_STATE_H
+
+extern "C" {
+#include <ccn/ccn.h>
+#include <ccn/charbuf.h>
+#include <ccn/keystore.h>
+#include <ccn/uri.h>
+#include <ccn/bloom.h>
+}
+
+#include <boost/thread.hpp>
+#include <boost/shared_ptr.hpp>
+/**
+ * \defgroup sync SYNC protocol
+ *
+ * Implementation of SYNC protocol
+ */
+namespace Sync {
+/**
+ * \ingroup sync
+ * @brief Data wrapper with size
+ */
+ class DataBuffer {
+private:
+	unsigned char *buffer;
+	size_t len;
+public:
+	DataBuffer(const unsigned char *buffer, size_t len);
+	DataBuffer(const DataBuffer &dataBuffer);
+	DataBuffer &operator=(const DataBuffer &dataBuffer);
+	~DataBuffer();	
+	size_t length() {return len;}
+	const unsigned char *buffer() { return const_cast<const unsigned char *> (buffer); }
+};
+
+/**
+ * \ingroup sync
+ * @brief A wrapper for ccnx library; clients of this code do not need to deal
+ * with ccnx library
+ */
+class CcnxWrapper { 
+private:
+	ccn* handle;
+	ccn_keystore *keyStore;
+	ccn_charbuf *keyLoactor;
+	boost::mutex mutex;
+	boost::shared_ptr<boos::thread> thread;
+
+private:
+	void createKeyLocator();
+	void initKeyStore();
+	const ccn_pkey *getPrivateKey();
+	const unsigned char *getPublicKeyDigest();
+	ssize_t getPublicKeyDigestLength();
+	void ccnLoop();
+
+public:
+  
+
+   CcnxWrapper();
+   ~CcnxWrapper();
+  /**
+   * @brief send Interest 
+   *
+   * @param strInterest the Interest name
+   * @param callback the callback function to deal with the returned data
+   */
+   int sendInterest(string strInterest, boost::function<void (DataBuffer &)> processData);
+   int sendInterestFilter(string prefix, boost::function<void (string)>
+   processInterest);
+   int publishData(string name, DataBuffer &dataBuffer);
+
+};
+
+} // Sync
+
+#endif // SYNC_STATE_H