diff --git a/tools/ndnsec-set-acl.hpp b/tools/ndnsec-set-acl.hpp
new file mode 100644
index 0000000..2d64aca
--- /dev/null
+++ b/tools/ndnsec-set-acl.hpp
@@ -0,0 +1,72 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013, Regents of the University of California
+ * BSD license, See the LICENSE file for more information
+ * Author: Yingdi Yu <yingdi@cs.ucla.edu>
+ */
+
+#ifndef NDNSEC_SET_ACL_HPP
+#define NDNSEC_SET_ACL_HPP
+
+#include "ndnsec-util.hpp"
+
+int
+ndnsec_set_acl(int argc, char** argv)
+{
+  using namespace ndn;
+  namespace po = boost::program_options;
+
+  std::string keyName; 
+  std::string appPath;
+
+  po::options_description desc("General Usage\n  ndnsec set-acl [-h] keyName appPath \nGeneral options");
+  desc.add_options()
+    ("help,h", "produce help message")
+    ("keyName,k", po::value<std::string>(&keyName), "Key name.")
+    ("appPath,p", po::value<std::string>(&appPath), "Application path.")
+    ;
+
+  po::positional_options_description p;
+  p.add("keyName", 1);
+  p.add("appPath", 1);
+
+  po::variables_map vm;
+  try
+    {
+      po::store(po::command_line_parser(argc, argv).options(desc).positional(p).run(), vm);
+      po::notify(vm);
+    }
+  catch (std::exception &e)
+    {
+      std::cerr << "ERROR: " << e.what() << std::endl;
+      return 1;
+    }
+
+  if (vm.count("help"))
+    {
+      std::cerr << desc << std::endl;
+      return 0;
+    }
+
+  try
+    {
+      KeyChain keyChain;
+      keyChain.addAppToACL(keyName, KEY_CLASS_PRIVATE, appPath, ACL_TYPE_PRIVATE);
+
+    }
+  catch(const SecTpm::Error& e)
+    {
+      std::cerr << e.what() << std::endl;
+      return 1;
+    }
+  catch(const SecPublicInfo::Error& e)
+    {
+      std::cerr << e.what() << std::endl;
+      return 1;
+    }
+
+  
+  return 0;
+}
+
+#endif //NDNSEC_SET_ACL_HPP